a1 a3 patient monitors service guide

150
Part Number M3921-9000C Printed in the U.S.A. February 2002 First Edition *M3921-9000C* Philips A1 and A3 Patient Monitors Service Guide A1 Models: M3921A M3922A M3923A M3924A A3 Models: M3926A M3927A M3928A M3929A

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Page 1: A1 A3 Patient Monitors Service Guide

*M3921-

Philips A1 and A3 Patient Monitors

A1 Models: M3921AM3922AM3923AM3924A

A3 Models: M3926AM3927AM3928AM3929A

Service Guide

Part Number M3921-9000C

Printed in the U.S.A. February 2002

First Edition

9000C*

Page 2: A1 A3 Patient Monitors Service Guide

About this Manual

Proprietary Information

This document contains proprietary information, which is protected by copyright. All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.

Philips Medical Systems3000 Minuteman RoadAndover, MA 01810-1085(978) 687-1501

Publication numberM3921-9000CPrinted in USA

Warranty

The information contained in this document is subject to change without notice.

Philips Medical Systems makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties or merchantability and fitness for Philips Medical Systems shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

Copyright

Copyright © 2002 Philips Electronics North America Corporation

Printing History

New editions of this document incorporate all material updated since the previous edition. Update packages may be issued between editions and contain replacement and additional pages to be merged by a revision date at the bottom of the page. Pages that are rearranged due to changes on a previous page are not considered revised.

The documentation printing date and part number indicate its current edition. The printing date changes when a new edition is printed. (Minor corrections and updates that are incorporated at reprint do not cause the date to change.) The document part number changes when extensive technical changes are incorporated.

This edition, M3921-9000C combines both A1 and A3 Service Guides into one book. There is no M3921-9000B book.

First Edition............................................................... February 2002

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About this Manual

Philips Software License Terms

ATTENTION: USE OF THE SOFTWARE IS SUBJECT TO THE PHILIPS SOFTWARE LICENSE TERMS SET FORTH BELOW. USING THE SOFTWARE INDICATES YOUR ACCEPTANCE OF THESE LICENSE TERMS. IF YOU DO NOT ACCEPT THESE LICENSE TERMS, YOU MAY RETURN THE SOFTWARE FOR A FULL REFUND. IF THE SOFTWARE IS BUNDLED WITH ANOTHER PRODUCT, YOU MAY RETURN THE ENTIRE UNUSED PRODUCT FOR A FULL REFUND.

PHILIPS SOFTWARE LICENSE TERMS

The following License Terms govern your use of the accompanying Software unless you have a separate signed agreement with Philips Medical Systems.

License Grant. Philips Medical Systems grants you a license to Use one copy of the Software. "Use" means storing, loading, installing, executing or displaying the Software. You may not modify the Software or disable any licensing or control features of the Software. If the Software is licensed for "concurrent use", you may not allow more than the maximum number of authorized users to Use the Software concurrently.

Ownership. The Software is owned and copyrighted by Philips or its third party suppliers. Your license confers no title to, or ownership in, the Software and is not a sale of any rights in the Software. Philips� third party suppliers may protect their rights in the event of any violation of these License Terms.

Copies and Adaptations. You may only make copies or adaptations of the Software for archival purposes or when copying or adaptation is an essential step in the authorized Use of the Software. You must reproduce all copyright notices in the original Software on all copies or adaptations. You may not copy the Software onto any public network.

No Disassembly or Decryption. You may not disassemble or decompile the Software unless Philips prior written consent is obtained. In some jurisdictions, Philips consent may not be required for limited disassembly or decompilation. Upon request, you will provide Philips with reasonably detailed information regarding any disassembly or decompilation. You may not decrypt the Software unless decryption is a necessary part of the operation of the Software.

Transfer. Your license will automatically terminate upon any transfer of the Software. Upon transfer, you must deliver the Software, including any copies and related documentation, to the transferee. The transferee must accept these License Terms as a condition to the transfer.

Termination. Philips Medical Systems may terminate your license upon notice for failure to comply with any of these License Terms. Upon termination, you must immediately destroy the Software, together with all copies, adaptations and merged portions in any form.

Export Requirements. You may not export or re-export the Software or any copy or adaptation in violation of any applicable laws or regulations.

U.S. Government Restricted Rights. The Software and any accompanying documentation have been developed entirely at private expense. They are delivered and licensed as

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About this Manual

"commercial computer software" as defined in DFARS 252.227-7013 (Oct. 1988), DFARS 252.211-7015 (May 1991) or DFARS 252.227-7014 (Jun. 1995), as a "commercial item" as defined in FAR 2.101(a), or as "Restricted computer software" as defined in FAR 52.227-19 (Jun. 1987)(or any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such Software and any accompanying documentation by the applicable FAR or DFARS clause or the Philips standard software agreement for the product involved.

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About this Manual

Text Conventions

The following conventions for Notes, Cautions, and Warnings are used in this manual.

NOTE

A Note calls attention to an important point in the text.

CautionA Caution calls attention to a condition or possible situation that could damage or destroy the product or the user�s work.

WarningWarningA Warning calls attention to a condition or possible situation that could cause injury to the user and/or patient.

Explanation of Symbols

Symbols on products and packaging mean the following:

Battery Gauge icon

Defibrillator-proof type CF equipment

On/Standby button.

Alarm Limits icon.

Adjust Screen Contrast to display (monochrome) or invert the video to (color).

Adjust Heart Rate Tone volume.

Initiate NiBP measurement

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About this Manual

NiBP

ECG

Temperature

SpO2

Located on recorder. Produces a 20 Second Snapshot

Located on recorder. Produces a Continuous Print

Signal (ECG) Input

Signal (ECG) Output

Data input/output

Alternating Current

Direct Current

Temperature

Humidity

Altitude or atmospheric pressure

T

SpO2

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About this Manual

Contains parts that may not be put into normal waste disposal but must be recycled or dealt wi disposed as chemical waste

Fragile, handle with care

Keep dry

Consult instructions for use

Date of manufacture

Refer to User�s Guide

DC Lines

DC Input

Defib Sync.

RS-232 I/O

Class II Equipment

Power supply if for indoor use only

Silence Alarm

Equipotential Ground

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About this Manual

Recorder�s front-panel charging LED

Recorder�s front-panel communication LED

Ground Wire

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Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Patient Monitor Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Introduction to External Recorder (M3925A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2. Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Periodic Safety And Functional Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Environmental Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3. Performance Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Test And Inspection Matrix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Equipment Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Performance Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Battery Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Battery Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Power-On Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Hardware and Software Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

SpO2 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Operation with an ECG Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Operation with a Respiration Simulator (A3 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Verification of Pneumatic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Operation with a Temperature Simulator (A1 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Operation with a Temperature Simulator (A3 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Serial Interface Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Printer Verification (For A1 Optional Printer M3925A) . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Safety Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Ground Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Electrical Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4. Power-up Defaults Menu And Diagnostic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 37Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Power-up Defaults Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37Diagnostic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41System A/D Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42NIBP Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Restoring Factory Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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5. Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49How To Use This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Who Should Perform Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Replacement Level Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Obtaining Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Generating an Error Log Printout (A1 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Serviceable Hardware Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Other Error Codes (All Monitors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Buttons/Wheels (All Monitors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Display/Audible Tones (All Monitors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Operational Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

6. Disassembly Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63How To Use This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64Disassembly Procedures (A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Closed Case Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Separation of Front and Rear Case Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Front Case Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70Rear Case Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75Main PCB Disassembly Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Disassembly Procedures (A3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79Closed Case Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79Separation of Front and Rear Case Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80Front Case Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82Rear Case Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

7. Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91Small Parts Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91Top Level Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92Front Case Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97Rear Case Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103Main PCB Assembly (A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107Power Supply, Cables, and Miscellaneous Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109Exchange Unit Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

8. Packing For Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113Repacking In Original Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113Repacking In A Different Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

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9. RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116Nurse Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

10. Training Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Levels of Involvement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Preventative Maintenance Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117Phone Support or Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Training Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Essential Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Optional Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119Support Strategies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Unit exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120Bench repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Theory of Operation and System Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121System Overview - A1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121Block Diagram - A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121Block Diagram - A1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122System Overview - A3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123Block Diagram - A3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123Block Diagram - A3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130Monitor Applications and Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Reference Documents and Other Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Index

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xii Contents

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1Introduction

Manual Overview

This manual contains information for servicing the A1 and A3 patient monitors, subsequently referred to as the monitor throughout this manual. Only where there are differences in service procedures for the two monitor types is each monitor referred to specifically as A1 and A3. Only qualified service personnel should service this product. Before servicing the monitor, read the User Guide carefully for a thorough understanding of operation.

Introduction 1

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Patient Monitor Description

Patient Monitor Description

The purpose and function of the patient monitor is to monitor: ECG; heart rate; noninvasive blood pressure (systolic, diastolic, and mean arterial pressures); functional arterial oxygen saturation; respiration rate (A3 only); and temperature for adult and pediatric patients in all hospital areas and hospital-type facilities. It can be used during hospital transport and in mobile, land-based environments, such as ambulances.

The physical and operational characteristics of the monitor are described in the User Guide.

The measurement parameters and features for each model are indicated below.

Model Measurement Parameters and Features

NIBP SpO2 Temp ECG Resp Integral Recorder

Color/Mono

A1 Monitor

M3921A Yes Yes No No No No Mono

M3922A Yes Yes Yes No No No Mono

M3923A Yes Yes No Yes No No Mono

M3924A Yes Yes Yes Yes No No Mono

M3925A Optional Standalone Recorder for A1

A3 Monitor

M3926A Yes Yes Yes Yes Yes No Mono

M3927A Yes Yes Yes Yes Yes Yes Mono

M3928A Yes Yes Yes Yes Yes No Color

M3929A Yes Yes Yes Yes Yes Yes Color

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Introduction to External Recorder (M3925A)

Introduction to External Recorder (M3925A)

The recorder is an optional, standalone printer designed for use with the A1 patient monitor. The recorder communicates with the monitor using a null-modem cable connected between each device�s RS-232 connector.

The recorder contains an internal battery, which, when fully charged, will operate the recorder for 3 hours (typical, at 25°C, producing fifteen 20-second printouts per hour). The recorder can be connected to AC power using an external power supply. The recorder uses the same type of power supply as the A1 monitor, the PS-120V or PS-240V.

The recorder does not have an On/Off switch. The recorder can sense when it has an established communication link with the monitor. At that time, the green LINKED indicator on the front panel lights, indicating that the recorder is ready for operation. See the recorder�s User Guide for more information regarding its operation.

Related Documents

To perform test and troubleshooting procedures and to understand the principles of operation and circuit analysis sections of this manual, you must know how to operate the monitor. Refer to the User Guide to understand the various sensors, ECG lead, blood pressure cuffs, and temperature probes that work with the monitor. Refer also to the user guide and individual directions for use that accompany these accessories.

Introduction 3

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Related Documents

4 Introduction

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2Routine Maintenance

Cleaning

Warning Do not immerse the monitor or its accessories in liquid or clean with caustic or abrasive cleaners. Do not spray or pour any liquid on the monitor or its accessories.

To clean the monitor, dampen a cloth with a commercial, nonabrasive cleaner and wipe the exterior surfaces lightly. Do not allow any liquids to come in contact with the power connector or switches. Do not allow any liquids to penetrate connectors or openings in the instrument. For cables, sensors and cuffs, follow the cleaning instructions in the directions for use that accompany these accessories.

Periodic Safety And Functional Checks

The monitor requires cleaning, battery maintenance and NiBP performance and verification check every two years. The following performance verification tests may be used following repair or during routine maintenance (if required by your local institution).

1. Inspect the exterior of the monitor for damage.2. Inspect labels for legibility. If the labels are not legible, contact Philips�

Response Center or your local Philips representative.3. Verify that the NiBP performs properly as described in �Verification of

Pneumatic System� on page 21.

Battery

If the monitor has not been used for a long period of time, the battery will need charging. To charge the battery, connect the monitor to an AC outlet, or external DC supply in the case of the A3, as described in �Battery Charge� on page 13 or the �Setup and Use� chapter of the User Guide.

Note Storing the monitor for a long period without charging the battery can degrade the battery capacity. A complete battery recharge requires 8 hours.

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Environmental Protection

The battery can be recharged while the monitor is in use, in which case, the battery requires 14 hours to be recharged.The battery can require a full discharge/charge cycle to restore normal capacity.

If the monitor operates1 for less than one hour on battery power before the low battery alarm occurs, the battery should be conditioned.

If the same symptom persists even after the battery is conditioned and indicating a full charge, the battery should be replaced.

Refer to Chapter 6, �Disassembly Guide�.

Environmental Protection

Follow local governing ordinances and recycling plans regarding disposal or recycling batteries and other device components.

1. See �Battery Performance Test� on page 14 for typical battery operating times and conditions.

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3Performance Verification

IntroductionThis section discusses the tests used to verify performance following repairs or during routine maintenance. All tests can be performed without removing the covers of the monitor.

If the monitor fails to perform as specified in any test, repairs must correct the problem before the monitor is returned to the user.

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Test And Inspection Matrix

Test And Inspection Matrix

The following test map shows which tests are required in which situations.

Table 1 Test MapService Event (When

Performing�)Test Blocks Required (�Complete

these Tests)

Installation Visual and Power On Tests

Repairs

A. Unit Exchange Visual and Power On Tests

B. Unit Opened Power On TestBasic Pneumatic Leakage Test (BPL)Ground Integrity TestLeakage Current Test

C. NBP Pump replaced Power On TestNBP Tests:Pneumatic Leakage and Inflation Rate

D. SpO2 Module replaced Power On TestBPL TestSpO2 Tests:

Dynamic Operating Range andLED Excitation

E. Front End Connectors replaced Power On TestBPL TestPerformance test for the parameter that had the connector replaced.

F. Power Supply replaced (A3 only) Power On, BPL, and Safety tests

G. Component level repair on any PC board

Power On TestAll Performance TestsAll Safety Tests

H. Main PC board replaced Power On TestAll Performance tests except Battery Charge Test and Battery Performance Test

All software upgrades Power On

Preventative maintenance Power On and NBP Performance Tests

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Test And Inspection Matrix

Table 2 Test and Inspection Reporting

Test1

1. Details of the tests are included later in this chapter.

Expected Results What to Record2

2. When authorized Philips Medical Systems personnel service the instru-ment. The results are reported back to Philips. The collected data form a database to be used in product development. It is not necessary for hospi-tal personnel to report these results.

Visual: Inspect exterior of monitor for damage

No Visual Damage V:P or V:F

Power-On Self-Test Displays Normal Monitoring Screen Configuration and emits tones

PO:P or PO:F

Basic Pneumatic Leakage Test (NBP test)

After 1 minute at approximately 250 mmHg, pressure drops no more than 6 mmHg.

BPL: Px6Where x6 =Pressure Drop in mmHg

NiBP Accuracy Test 250 mmHg; ±5 mmHg PN:P/X1�X4 (or X53)

PN:F/X1�X4 (or X53)Record Pressure in mmHg = X1

3. In the case of the NiBP Deflation Rate Test, applicable to the A3 only.

NiBP Leakage Test After 1 Minute at 250 mmHg, pressure drops no more than 6 mmHg

Record Pressure Drop in mmHg = X2

NiBP Inflation Rate Test

Monitor Reports NiBP = 280 mmHg in <6 seconds

Record Time to280 mmHg inSeconds = X3

NiBP Overpressure Test

Overpressure Deflation is activated at a value between 280 mmHg to 330 mmHg

Record value in mmHg at which Overpressure Deflation occurs =X4

NiBP Deflation Rate Test (A3 only)

Monitor reports NiBP >10 mmHg and <190 mmHg

Record value in mmHg on monitor at 1 min = X5

Safety Performance Tests

All Safety Performance Tests are in range of Table 5 to Table 12

S:P or S:F

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Equipment Needed

Equipment Needed

The following table lists the equipment required for performance verification.

Table 3 Required Test EquipmentRequired For

Equipment Description A1 A3

Digital multimeter (DMM)

Fluke Model 87 or equivalent � �

Sensor extension cable M4787A � �

Finger clip sensor M4789A � �

Oxisensor® II adhesive sensor

D-25 � �

ECG cable M3913A M3923A and M3924A only

ECG electrodes Standard M3923A and M3924A only

ECG leads M3914A (IEC) or M3915A (AAMI)

M3923A and M3924A only

NiBP tubing M3918A � �

NiBP cuff 40401C � �

Pulse oximeter tester Nellcor Puritan Bennett SRC-2 � �

ECG simulator Dynatech Nevada medSim 300 or equivalent

� �

NiBP simulator Bio-Tek BP Pump or equivalent

� �

Temperature simulator medSim 300 or equivalent M3922A and M3924A only

Respiration simulator medSim 300 or equivalent � �

Safety analyzer Bio-Tek 601 Pro or equivalent � �

Stopwatch Manual or electronic � �

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Performance Tests

Performance Tests

The battery charge and battery performance test should be performed before monitor repairs whenever the battery is suspected as being a source of the problems. All other tests can be used following repairs or during routine maintenance (if required by your local institution). Before performing the battery performance test, ensure that the battery is fully charged. (See �Battery Charge� below).

This section is written using factory-set power-up defaults. If your institution has pre configured custom defaults, those values display.

Battery Charge

To fully charge the battery:

1. Connect the monitor to an AC power source using the proper power cord. For the A1, use the PS-120V or PS-240V external power supply and power cord.

2. � For the A1, verify that the EXTERNAL POWER indicator is lit.

� For the A3, verify that the BATTERY CHARGING/AC SOURCE indicator is lit.

3. Charge the battery for at least 8 hours.The battery can require a complete discharge/charge cycle to restore its normal capacity, depending on its previous usage.

4. To check for a full charge, perform the procedure described in �Battery Performance Test� on page 12.

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Battery Performance Test

Battery Performance Test

The the A1 and A3 mono monitors are specified to typically operate on battery power for a minimum of 4 hours, at 25°C, with no printing, and one NiBP measurement every 15 minutes. The A3 color monitor is specified to typically operate on battery power for a minimum of 3 hours, at 25°C, with no printing, and one NiBP measurement every 15 minutes. Before performing this test, ensure that the battery is fully charged (see �Battery Charge�).

1. Connect the Nellcor Puritan Bennett SRC-2 pulse oximeter tester to the monitor via the M4787A sensor cable.

2. Connect the NiBP simulator to the monitor via the M3918A tubing.3. Set the SRC-2 switches as follows:

4. Set the NiBP simulator to simulate a pressure setting of 120/80 mmHg and heart rate of 80 bpm.

5. Ensure that the monitor is not connected to AC power.

6. With the monitor turned off, press the ON/STANDBY button and verify that the battery icon appears at the bottom of the display after the power-on self-test is completed. The boxes in the battery icon should all be filled, indicating that the battery is charged.

7. Verify that the monitor is responding to the SpO2 simulator signal and that the audible alarm is sounding. Use the wheel to select the SpO2 Menu and permanently silence the SpO2 audible alarm.

8. Use the wheel to select the NiBP Menu and set the Automatic Measurement Interval to 15 minutes. Exit the menu and press the front panel NiBP button

to manually start the first NiBP measurement. Subsequent NiBP

measurements are taken automatically every 15 minutes.

SWITCH POSITION

RATE 38

LIGHT LOW

MODULATION LOW

RCAL/MODE RCAL 63/LOCAL

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Power-On Self-Test

9. The A1 and A3 mono monitors must operate for at least 4 hours before they automatically power down due to low battery condition. The A3 color monitor must operate for at least 3 hours before the monitor automatically powers down due to low battery condition.

10. Verify that the low battery alarm occurs 15-30 minutes before the battery fully discharges.

11. Allow the monitor to operate until it automatically powers down due to low battery condition. Verify that the audible alarm sounds when the monitor automatically shuts down. Press the Alarm Silence button to terminate this audible alarm.

12. If monitor passes this test, immediately recharge the battery. (See �Battery Charge� on page 11).

Power-On Self-Test1. Connect the monitor to an AC power source. For the A1, use the PS-120V or

PS-240V power supply and power cord. For the A3, use the proper power cord supplied.

2. � For the A1, verify that the EXTERNAL POWER indicator is lit.

� For the A3, verify that the BATTERY CHARGING/AC SOURCE indicator is lit.

3. Do not connect any input cables to the monitor.4. Observe the monitor front panel. With the monitor off, press the ON/

STANDBY button . The monitor must perform the following sequence:

a. The A1 emits a beep.The A3 emits three consecutively higher pitched beeps.

b. A few seconds later, the display backlight illuminates, but the display is blank.

c. The version numbers of the boot and operational software display in the lower left corner of the display.

d. A beep signals the end of the power-on self-test. Power-on self-test takes approximately 10 seconds to complete.

e. Upon successful completion of the power-on self-test, the display is in normal monitoring screen configuration. No vital-sign numeric values or waveforms are displayed.

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Hardware and Software Tests

Hardware and Software Tests

Hardware and software testing includes the following tests applicable to the indicated models in the series:

SpO2 Testing

SpO2 testing includes the following tests:

� Alarms and Alarm Silence� Heart Rate Tone Volume Control� Dynamic Operating Range� LED Excitation Test

Alarms and AlarmSilence

1. Connect the SRC-2 pulse oximeter tester to the M4787A sensor cable and connect the cable to the monitor.

2. Set SRC-2 as follows:

3. Press the ON/STANDBY button to turn the monitor on.

4. After the normal power-up sequence, verify that the SpO2% display initially

Test Applies to Model(s)

SpO2 Testing A1, A3 - all models

Operation with an ECG Simulator A1 - M3923A, M3924AA3 - all models

Operation with a Respiration Simulator A3 - all models

Verification of Pneumatic System A1, A3 - all models

Operation with a Temperature Simulator A1 - M3922A, M3924AA3 - all models

General Operation A1, A3 - all models

SWITCH POSITION

RATE 38

LIGHT LOW

MODULATION OFF

RCAL/MODE RCAL 63/LOCAL

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Hardware and Software Tests

indicates zero or is blank. The pulse bar can occasionally indicate a step change as the monitor is in the pulse search mode.

5. Move the modulation switch on the SRC-2 to LOW.6. Verify the following monitor reaction:

a. The pulse bar begins to track the artificial pulse signal from the SRC-2.

b. Initially, zero is displayed in the SpO2 frame, or it is blank.

c. After about 10 to 20 seconds, the monitor displays saturation and heart rate as specified by the tester. Verify that the values are within the following tolerances:

Oxygen Saturation Range 79% to 83%

Heart Rate Range 35 to 41 bpm

d. The audible alarm sounds and both the SpO2% and HEART RATE displays flash, indicating both parameters have violated the default alarm limits.

e. The heart rate tone is heard. For this test, the user should set the heart rate tone source to SpO2 from the Heart Rate Menu.

7. Press the ALARM SILENCE button on the front panel of the monitor. The audible alarm is temporarily silenced.

8. Verify the following:a. The audible alarm remains silenced.

b. The slashed bell icon appears in each numeric frame on the display.

c. The SpO2% and HEART RATE displays continue flashing.

d. The heart rate tone remains audible.

e. The audible alarm returns in approximately 60 seconds.

Heart Rate ToneVolume Control

1. Connect the SRC-2 pulse oximeter tester to the M4787A sensor cable and connect the cable to the monitor.

2. Set SRC-2 as follows:

SWITCH POSITION

A1 A3

RATE 38 38

LIGHT LOW LOW

MODULATION LOW OFF

RCAL/MODE RCAL 63/LOCAL RCAL 63/LOCAL

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Hardware and Software Tests

3. Power on the monitor and verify that the SpO2 and heart rate values are correctly displayed.

4. Press the ALARM SILENCE button on the front panel of the monitor to temporarily silence the audible alarm.

5. Verify that the heart rate tone source, found in the Heart Rate Menu, is set to SpO2.

6. Press the Heart Rate Tone VOLUME button on the front panel of the monitor. Within 3 seconds of having pressed the button, rotate the wheel clockwise and verify that the beeping heart rate tone sound level increases.

7. Rotate the wheel counterclockwise and verify that the beeping heart rate tone decreases until it is no longer audible. Rotate the wheel clockwise to return the beep volume to a comfortable level.

3 seconds after the last button-press or rotation of the wheel, function of the wheel reverts to moving the highlight on the display screen.

Dynamic OperatingRange

The following test sequence verifies proper monitor operation over a range of input signals.

1. Connect the pulse oximeter tester to the monitor and turn the monitor on.2. Place the SRC-2 pulse oximeter tester in the RCAL 63/LOCAL mode.3. Set the SRC-2 as indicated in below. Verify that the monitor readings are within

the indicated tolerances. Allow the monitor several seconds to stabilize the readings.

Table 4 SRC 2 Settings and Monitor Indications

An * indicates values that produce an alarm. Press the ALARM SILENCE button to temporarily silence the audible alarm.

For the pulse rate setting of 201 bpm, the pulse rate tolerance of 195 to 207 bpm is greater than the ±3 bpm accuracy specification of the monitor, due to the performance characteristics of the SRC-2 tester.

4. Turn the monitor off.

LED Excitation Test This procedure uses normal system components to test circuit operation. A

SRC-2 Settings Monitor Indications

RATE LIGHT MODULATION SpO2 Pulse Rate

38 HIGH2 LOW 79-83* 35-41*

112 HIGH1 HIGH 79-83* 109-115

201 LOW LOW 79-83* 195-207*

201 LOW HIGH 79-83* 195-207*

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Hardware and Software Tests

Nellcor Puritan Bennett Oxisensor II adhesive sensor, model D-25, is used to examine LED intensity control. The red LED is used to verify intensity modulation caused by the LED intensity control circuit.

1. Connect a M4787A sensor extension cable to the monitor.2. Connect a D-25 sensor to the sensor extension cable.

3. Press the ON/STANDBY button to turn the monitor on.

4. Leave the sensor open with the LED and photo detector visible.5. After the monitor completes its normal power-up sequence, verify that the

sensor LED is brightly lit.6. Slowly move the sensor LED in proximity to the photo detector element of the

sensor. Verify, as the LED approaches the optical sensor, that the LED intensity decreases.

7. Open the sensor and notice that the LED intensity increases.8. Repeat step 6 and the intensity again decreases. This variation is an indication

that the micro-processor is in proper control of LED intensity.9. Turn the monitor off.

Operation with an ECG Simulator

1. With the monitor off, connect the ECG leads to the appropriate jacks on the ECG tester.

2. Connect the leads to the ECG cable.3. Connect the cable to the ECG input port on the monitor.4. Set the ECG simulator as follows:

Note The accuracy of the monitor�s ECG measurements is ±5 bpm. In the procedure below, add the tolerance of the simulator to the acceptable range of readings.

5. Press On/Standby button to turn monitor on.

Heart rate: 30 bpm

Amplitude: 1 millivolt

Lead select: II

Wave Type: Normal sinus rhythm

Patient Type: Adult mode

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6. After normal power-up sequence, verify the following monitor reactions:a. After at least five heartbeats, the monitor displays a heart rate of 30 ±5 bpm.

b. The audible alarm sounds and the HEART RATE display flashes, indicating heart rate is below the default lower alarm limit.

7. Press the ALARM SILENCE button. Verify that the audible alarm is silenced.

8. Increase the heart rate setting on the ECG simulator to 240 bpm.9. After at least five heartbeats, verify that the monitor displays a heart rate of 240

±5 bpm.

10. Verify that the audible alarm sounds and the HEART RATE display flashes, indicating that the heart rate is above the default upper alarm limit.

11. Press ALARM SILENCE button to silence alarm.

12. Decrease the heart rate setting on ECG simulator to 120 bpm.13. After at least five heartbeats, verify that the monitor displays a heart rate of 120

±5 bpm.14. Disconnect the LL lead from ECG simulator.

15. Verify that the Leads Off alarm message appears, three dashes are displayed in HEART RATE display, and the low priority audible alarm sounds.

16. Reconnect the LL lead to ECG simulator. Verify that the Leads Off alarm message no longer appears and audible alarm is silenced.

17. Repeat steps 14 through 16 for LA and RA leads.18. Turn the monitor off.

Operation with a Respiration Simulator (A3 only)

1. With the monitor off, connect the ECG leads to the appropriate jacks on the respiration simulator.

2. Connect the ECG leads to the ECG cable.3. Connect the cable to the ECG input port on the monitor.

Note The accuracy of A3 measurements is ±3 breaths per minute. In the procedure below, add the tolerance of the simulator to the acceptable range of readings.

4. Set the simulator for a respiration rate of 120 breaths per minute.

5. Press the ON/STANDBY button to turn the monitor on.

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6. After the normal power-up sequence, verify the following monitor reactions:a. The monitor displays a respiration rate of 120 ±3 breaths per minute.

b. The audible alarm sounds and RESPIRATION RATE display flashes, indicating respiration rate is above default upper alarm limit.

7. Press the ALARM SILENCE button . Verify that the alarm is silenced.

8. Decrease the respiration rate setting on the respiration simulator to 20 breaths per minute.

9. Verify that the monitor displays a respiration rate of 20 ±3 breaths per minute.

Verification of Pneumatic System

The following tests, from �Basic Pneumatic Leakage Test� on page 19 through �Over-Pressure� on page 23, verify the functionality of the pneumatic system of the monitor. All these tests, with the exception of the Basic Pneumatic Leakage Test, require the use of an appropriate NiBP simulator. Although the tests were designed to use the Bio-Tek BP Pump noninvasive blood pressure simulator, any equivalent NiBP simulator with the same internal test volume can be used. The internal test volume of the Bio-Tek simulator is 250 ml.

The monitor must be placed in Diagnostic Mode, with the NiBP Test screen active for each of the NiBP tests. For a detailed explanation of the Diagnostic Mode, refer to Chapter 4, �Power-up Defaults Menu And Diagnostic Mode�.

Basic PneumaticLeakage Test

The purpose of this test is to verify the integrity of the NiBP Pneumatic System after the monitor has been opened. This covers all external and internal tubing and tubing connections. No simulator is required for this test.

In cases where the performance of the NiBP is in question or could have been compromised during repair the complete set of NiBP performance tests described in this service manual should be used (see test map, page 8, for guidance).

1. Attach an NiBP cuff (adult model 40401C is recommended) and the NiBP adapter cable to the monitor NiBP connector.

2. Wrap the cuff around itself and place on a table for the test, DO NOT place the cuff on your arm.

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3. Power on the monitor and enter the NiBP test screen.a. Use the wheel to select Set up menu (screwdriver icon on bottom

of screen.)

b. Select the Power up defaults menu.

c. Use the wheel to select password 2-1-5.

d. Select Enter Diagnostic Mode = yes.

e. Select NBP test.

4. Press the Heart Rate Tone VOLUME button to close valves.

5. Press NBP start/stop switch, hold until the monitor screen shows 250 mmHg.6. Wait 15-20 seconds to allow the value to stabilize.7. Note the value on the screen, start 1-minute timer.8. After 1 minute note the value on the screen, if the difference is less than or equal

to 6 mmHg the test has passed.

9. Press and hold the Heart Rate Tone VOLUME button until the screen shows the pressure has released and the value is 0 mmHg.

10. Turn the monitor off.

Note If the test fails, ensure the integrity of the cuff and adapter tubing, then test again. If the test fails again, verify the integrity of all the pneumatic system tubing inside the monitor. If the test still does not pass, see test map, page 8.

Each of the tests mentioned below must be performed to verify pneumatic system functionality. These tests can be performed individually (in any order) or sequentially. Prior to performing any of these tests, perform the following setup procedure. If these tests are performed in sequence, this procedure needs to be performed once prior to the first test.

1. Turn on the Bio-Tek simulator and press the MODE button to place the simulator in test mode. The simulator screen indicates Internal Cuff and Pressure Gauge.

2. Connect the simulator tubing to the NiBP connector on the monitor.3. Follow the procedure described in Chapter 4 to place the monitor in Diagnostic

Mode with the NiBP Test screen active.

Pressure TransducerAccuracy

The pressure transducer accuracy test verifies the pressure accuracy of the monitor�s pressure transducer.

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1. Confirm that the Bio-Tek simulator is in test mode. The simulator should display Pressure Gauge.

2. Confirm that the simulator is set up for the internal cuff.3. Confirm that the NiBP Test screen is active on the monitor.

� On the A1, press, then release, the Heart Rate Tone VOLUME button to verify that the valve is closed.

� On the A3, press the ALARM SILENCE button to ensure that both valves are closed.

4. Perform an offset adjustment so that the simulator and monitor both display a pressure of 0 mmHg by doing the following:a. Press the CONTRAST button on the monitor.

b. Press the ZERO button on the simulator.

5. Press the SELECT button on the simulator until the simulator displays Pressure Source Set Test Pressure.

6. Use the UP/DOWN buttons on the simulator to adjust for a pressure of 250 mmHg.

7. Press the START PUMP button on the simulator. The simulator begins to pressurize. The current pressure in mmHg is displayed on both the simulator and the monitor displays.

8. Allow 15-20 seconds for the pressure to stabilize.The pressure displayed on the monitor and the simulator should be within 5 mmHg of one another to complete the test successfully.

9. Press the STOP PUMP button on the simulator to stop the test.

10. Press and hold the Heart Rate Tone VOLUME button until the monitor displays a pressure of 0 mmHg.

Additional NiBP tests can be performed at this time. If no further NiBP tests are to be conducted, turn the monitor off. Normal monitoring operation returns the next time the monitor is turned on.

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Pneumatic Leakage The pneumatic leakage test verifies the integrity of the pneumatic system.

1. Ensure that the Bio-Tek simulator is in test mode. The simulator should display Pressure Gauge.

2. Confirm that the simulator is set up for the internal cuff.3. Ensure that the NiBP Test screen is active on the monitor.

4. Press the Heart Rate Tone VOLUME button on the monitor.

� On the A1, this verifies that the valve is closed.� On the A3, this verifies that both the valves are closed.

5. Perform an offset adjustment so that the simulator and monitor both display a pressure of 0 mmHg by doing the following:a. Press the CONTRAST button on the monitor.

b. Press the ZERO button on the simulator.

6. Press the NiBP button on the monitor to activate the pump.

7. Hold the NiBP button until the monitor displays a pressure of

approximately 250 mmHg.8. Allow 15-20 seconds for the pressure to stabilize.9. Record the pressure displayed on the monitor.10. Start a 1 minute timer.11. After 1 minute, again record the pressure displayed.

The test is successfully completed if the pressure has dropped by 6 mmHg, or less, during the 1 minute period.

12. Press and hold the Heart Rate Tone VOLUME button until the monitor displays a pressure of 0 mmHg.

Additional NiBP tests can be performed at this time. If no further NiBP tests are to be conducted, turn the monitor off. Normal monitoring operation returns the next time the monitor is turned on.

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Inflation Rate The inflation rate test verifies the inflation rate of the monitor.

1. Ensure that the Bio-Tek simulator is in test mode. The simulator should display Pressure Gauge.

2. Confirm that the simulator is set up for the internal cuff.3. Ensure that the NiBP Test screen is active on the monitor.

4. Press the Heart Rate Tone VOLUME button on the monitor.

� On the A1, this verifies that the valve is closed.� On the A3, this verifies that both the valves are closed.

5. Perform an offset adjustment so that the simulator and monitor both display a pressure of 0 mmHg by doing the following:a. Press the CONTRAST button on the monitor.

b. Press the ZERO button on the simulator.

1. Press the NiBP button on the monitor to activate the pump, and

simultaneously start the timer.

2. Hold the NiBP button until the monitor displays a pressure of 280

mmHg, then stop the timer.The test is successfully completed if the inflation time is between 1 and 6 seconds.

3. Press and hold the Heart Rate Tone VOLUME button until the monitor displays a pressure of 0 mmHg.

Additional NiBP tests can be performed at this time. If no further NiBP tests are to be conducted, turn the monitor off. Normal monitoring operation returns the next time the monitor is turned on.

Over-Pressure The over-pressure test verifies the functionality of the over-pressure relief system of the monitor.

1. Ensure that the Bio-Tek simulator is in test mode. The simulator should display Pressure Gauge.

2. Confirm that the simulator is set up for the internal cuff.3. Ensure that the NiBP Test screen is active on the monitor.

4. Press the Heart Rate Tone VOLUME button on the monitor.

� On the A1, this verifies that the valve is closed.� On the A3, this verifies that both the valves are closed.

5. Perform an offset adjustment so that the simulator and monitor both display a

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Hardware and Software Tests

pressure of 0 mmHg by doing the following:a. Press the CONTRAST button on the monitor.

b. Press the ZERO button on the simulator.

6. Press the NiBP button on the monitor to activate the pump.

7. Hold the NiBP button until the monitor displays a pressure of

approximately 250 mmHg.8. Press the SELECT button on the simulator until the simulator displays

Overpressure Test.

9. Press the START TEST button on the simulator. The simulator pressurizes the system until the monitor�s overpressure relief system activates, including the warning display screen. The simulator displays the pressure value that caused the monitor�s overpressure relief system to activate. The test is successfully completed if the simulator displays a pressure reading of 280 mmHg to 330 mmHg.

10. Press and hold the Heart Rate Tone VOLUME button to ensure that the monitor displays a pressure of 0 mmHg.

Additional NiBP tests can be performed at this time. If no further NiBP tests are to be conducted, turn the monitor off. Normal monitoring operation returns the next time the monitor is turned on.

Deflation Rate The deflation rate test verifies the deflation rate of the A3 monitor. (There is no deflation rate test for the A1).

1. Ensure that the Bio-Tek simulator is in test mode. The simulator should display Pressure Gauge.

2. Confirm that the simulator is set up for the internal cuff.3. Ensure that the NiBP Test screen is active on the monitor.

4. Press the Heart Rate Tone VOLUME button on the monitor. This verifies that both the valves are closed.

5. Perform an offset adjustment so that the simulator and monitor both display a pressure of 0 mmHg by doing the following:a. Press the CONTRAST button on the monitor.

b. Press the ZERO button on the simulator.

6. Press the NiBP button on the monitor to activate the pump.

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Hardware and Software Tests

7. Hold the NiBP button until the monitor displays a pressure of

approximately 250 mmHg.8. Start 1 minute timer, and simultaneously press and hold the ALARM SILENCE

button on the monitor.

This causes the pneumatic system to deflate at a rate of 3 mmHg/s ±1.5 mmHg/s.

9. After 1 minute, record the pressure displayed on the monitor. The test has been successfully completed if the monitor displays a pressure reading of 10 mmHg to 190 mmHg.

10. Press and hold Heart Rate Tone VOLUME button until monitor displays a pressure of 0 mmHg.

Additional NIBP tests can be performed at this time. If no further NiBP tests are to be conducted, turn the monitor off. Normal monitoring operation returns the next time the monitor is turned on.

Operation with a Temperature Simulator (A1 only)

1. Remove the probe from its holder.2. Insert the calibration key in the temperature input port T on the A1.

3. Press the ON/STANDBY button to turn the monitor on. After the normal power-up sequence, verify that the temperature reads 36.3 ± 0.1°C (or 97.3 ± 0.2°F).

4. Turn the monitor off.

Operation with a Temperature Simulator (A3 only)

1. With monitor off, connect the temperature cable (supplied with the temperature simulator) to the appropriate connector on temperature simulator.

2. Connect the temperature cable to the temperature input port on the A3.3. Set the temperature simulator as follows:

Temperature: 37°C (98.6°F)

Probe Type: YSI 400 Series

Note The accuracy of A3 temperature measurements is ±0.1°C (±0.2°F). In the procedure below, add the tolerance of the simulator to the acceptable range of readings.

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General Operation

4. Press the ON/STANDBY button to turn monitor on.

5. After normal power-up sequence, verify temperature reads 37°C ±0.1°C (98.6°F ±0.2°F if Fahrenheit is selected as temperature units.)

6. Turn the monitor off.

General Operation

The following tests provide an overall performance check of the system:

� Serial Interface Test� Printer Verification (for optional printer - A1 only)

Serial Interface Test

Note Perform only if nurse call signal is used.

Perform the following procedure to test the serial port voltages. The test is qualitative and only verifies that the serial interface port is powered correctly, and that the Nurse Call signal is operational. The serial connector is a male DB-9 located on the monitor�s real panel, identified with the RS-232 symbol

.

1. Turn the monitor on.

2. Set up the DMM with the function set to VDC at a range of 10 volts.

3. Connect the DMM negative lead to connector pin 5 (GND), or the shell of the RS-232 connector.

4. Referring to the following table, connect the DMM positive lead to each pin in turn, and verify the voltage values listed. Voltage for pin 9 is that listed for the no alarm condition.

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General Operation

Table 5 Serial Interface Voltages

5. Connect the Nellcor Puritan Bennett SRC-2 pulse oximeter tester to the monitor via the M4787A sensor extension cable.

6. Set the SRC-2 switches as follows:

7. Verify that the monitor is responding to the SpO2 simulator signal and the audible alarm is sounding. If desired, press the ALARM SILENCE button

to temporarily silence the audible alarm.

8. Connect the DMM positive lead to pin 9 and verify the voltage value listed in Table 5. Voltage for pin 9 is that listed for the alarm underway condition.

Pin Signal DirectionMeasurement (V)

Min. Typical Max.

1 not used 0.4 0.0 0.4

2 RXD<<< input �0.4 0.0 0.4

3 TXD>>> output �0.5 �9.0 �15.0

4 DTR>>> output �5.0 �9.0 �15.0

5 GND �0.4 0.0 0.4

6 DSR<<< input �0.4 0.0 0.4

7 RTS>>> output �5.0 �9.0 �15.0

8 CTS<<< input �0.4 0.0 0.4

9 Alarm Out>>>(no alarm)

output �5.0 �9.0 �15.0

9 Alarm Out>>> (alarm underway)

output 5.0 9.0 15.0

SWITCH POSITION

RATE 38

LIGHT LOW

MODULATION LOW

RCAL/MODE RCAL 63/LOCAL

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General Operation

Printer Verification (For A1 Optional Printer M3925A)

Printer verification consists of connecting the printer to the monitor and the monitor to a human subject for a qualitative test.

1. Connect the output of the appropriate power supply, PS-240V or PS-120V, to

the labeled connector on the rear of the printer. When the

printer�s external power supply is connected, the printer front-panel charging LED is lit.

2. Connect the serial cable between the labeled connectors on the

rear panels of the monitor and the printer.

3. The printer front panel communication LED is lit when the RS-232 communications link is completed.

4. Rotate the monitor wheel to highlight the setup icon . Press the wheel

and ensure Communications Selection is Printer.

5. Connect a M4787A sensor extension cable to the monitor. Connect an oxygen transducer to the sensor extension cable. Attach it to the subject as described in the sensor directions for use.

6. Press the ON/STANDBY button to turn the monitor on and verify that the monitor is operating.

7. The monitor should stabilize on the subject�s physiological signal in about 15 to 30 seconds. Verify that the saturation and heart rate is reasonable for the subject.

8. Press the printer CONTINUOUS button . Verify that the printout contains vital signs across the top of the paper, and that a SpO2 waveform, with grid marks, occupies the center portion of the paper. To terminate the printout, press the CONTINUOUS button again.

9. Disconnect the sensor and shut off the monitor.

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Safety Tests

Safety Tests

Philips safety tests meet the standards of, and are performed in accordance with IEC 601-1, Clause 19 (EN60601-1, Second Edition, 1988; Amendment 1, 1991-11, Amendment 2, 1995-03).

The A1 patient monitor is a Class II device. It is double insulated and does not require a protective earth (ground) wire. The A3 patient monitor is a Class I device. It requires a protective earth (ground) wire. Test requirements differ for Class I and Class II devices. Be aware of the differences and use the appropriate test procedure for the monitor in use.

There are two categories of safety tests:

� Ground Integrity� Electrical Leakage

Ground Integrity

Table 6 Ground IntegrityTest or �Inspection� to Perform Expected Test Results

Protective EarthSee �Safety Test Diagram - Protective Earth� on page 30

With mains cable:Maximum impedance = x <= 100 mOhms

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Safety Tests

Note The A1 does not require an isolated Earth Ground terminal, neither is one installed. No Protective Ground Continuity check is required.

Safety Test Diagram - Protective Earth

Test or Inspection to Perform

Measures impedance of Protective Earth (PE) terminal to all exposed metal parts of IUT, which are for safety reasons connected to the Protective Earth (PE). Max. 100 mOhm. Test current 25 Amps applied for 5 to 10 seconds. We recommend to flex the main cable during the test in order to identify potential bad contact or damage of the earth wire. Safety test according to EN60601-1 (Clause 18). Report largest value.

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Safety Tests

Electrical Leakage

The following tests verify the electrical leakage of the monitor:

� Earth Leakage Current (A3 only)� Enclosure Leakage Current � Patient Leakage Current� Patient Source Current, with Mains Voltage on the Applied Part

Perform all leakage tests any time the unit is opened.

Earth Leakage Current(A3 only)

This test is in compliance with IEC 601-1 (Earth Leakage Current). In locations where mains voltage is 100-120 volts, the applied voltage is 132 volts. In locations where mains voltage is 220-240 volts, the applied voltage is 264 volts. The applied AC frequency should be the same as the local mains (50 or 60 Hz).

All measurements shall be made with the power switch in both ON and OFF positions.

1. Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions.

2. Perform test as recommended by analyzer operating instructions.

Earth leakage current is measured under various conditions of the AC mains and protective earth conductor. For each condition, the measured leakage current must not exceed that indicated below

Table 7 Earth Leakage Current Values (A3 Only).

Enclosure LeakageCurrent

This test is compliance with EN60601-1 (Enclosure Leakage Current). Test at 110% of the nominal line voltage.

1. Connect the A3�s AC mains power cord to the analyzer as recommended by the analyzer operating instructions.

2. Using the appropriate test cable, connect the analyzer to the snap nearest to the handle fixing screw as shown in the following photograph.

Test Condition Polarity Allowable Leakage Current

NormalNormal 300 µA

Reversed 300 µA

S.F.C1

Open Supply

1. S.F.C = Single Fault Condition

Normal 1000 µA

Reversed 1000 µA

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Safety Tests

3. Turn the monitor on.4. Perform the test as recommended by the analyzer operating instructions.

The analyzer leakage current indication must not exceed the values listed below.

Connect analyzertest cable to thesnap as arrowed

(or alternatively,to the handlefixing screw)

NOTE: do NOT use thissnap on the rear of thecase, or any of theother screws on the rearof the monitor

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Safety Tests

Table 8 Enclosure Leakage CurrentEN60601-1 (1990 + A1, A2, A11, A12, A13) and UL2601 (2nd Ed. 1997) US Deviations

Patient LeakageCurrent

This test measures patient leakage current in accordance with EN60601-1, Clause 19, for Class I, type CF equipment. Patient leakage current in this test is measured from any individual patient connection to earth (power ground).

This test requires a sample patient cable for each device parameter. These must be configured as recommended by the safety analyzer operating instructions.

1. Configure the electrical safety analyzer as recommended by the analyzer operating instructions.

2. � A1 - Connect the appropriate external power supply input power cord to the analyzer as recommended by the analyzer operating instructions. Connect the external power supply output cord to the monitor.

� A3 - Connect the monitor�s AC mains power cord to the analyzer as recommended by analyzer operating instructions.

3. Connect the ECG test cable between the ECG connector on the monitor and the appropriate input connector on the analyzer.

4. Turn the monitor on.5. Perform the test as recommended by the analyzer operating instructions.

Patient leakage current is measured under various conditions of the AC mains and protective earth conductor. For each condition, the measured leakage current must not exceed that indicated below.

6. Repeat the test for SpO2 and temperature patient connections, using appropriate test cables.

Test Condition Polarity Allowable Leakage Current

NormalNormal 100 µA

Reversed 100 µA

S.F.C1

Open Supply(A1 Only)

1. S.F.C = Single Fault Condition

Normal 150 µA

Reversed 150 µA

S.F.C1 OpenProtective Earth

(A3 Only)

Normal 300 µA

Reversed 300 µA

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Safety Tests

Table 9 Patient Leakage Current Values

Patient LeakageCurrent, with Mains

Voltage on the AppliedPart

This test measures patient leakage current in accordance with EN60601-1, Clause 19, for Class I, type CF equipment. In this test, 110% of mains voltage is applied between each patient connection and earth (power ground). Patient leakage current is then measured from any individual patient connection to earth.

Warning AC mains voltage is present on the applied part terminals during this test. Exercise caution to avoid electrical shock hazard.

Table 10 Safety Tests - Patient Leakage Current, with Mains Voltage on the Applied Part

Test Condition Polarity

Allowable Leakage Current (Max.)

Type CF

NormalNormal 10 µA

Reversed 10 µA

S.F.C.1 (Open Supply)(A1 Only)

1. S.F.C. = Single Fault Condition

Normal 50 µA

Reversed 50 µA

S.F.C.1(Open Earth/Ground)(A3 Only)

Normal 50 µA

Reversed 50 µA

Test or �Inspection� to Perform Expected Test Results

Patient Leakage Current - ACSee �Safety Test Diagram - Patient Leakage Current - AC� on page 35

Maximum leakage current = x<= 50 �A @ 250V (IEC601-1 or UL2601-1)

Test at 110% of the nominal line voltage.

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Safety Tests

Safety Test Diagram - Patient Leakage Current - AC

Test or Inspection to Perform

Measures patient leakage current from Applied Part to earth caused by external mains voltage on Applied Part with switch S5 open and closed. Each polarity combination possible is tested using S2 and S6.Safety test according to EN60601-1 (Clause 19.4.h). Report largest value.

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Safety Tests

36 Performance Verification

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4Power-up Defaults Menu And Diagnostic

Mode

Introduction

This section discusses use of the Power-up Defaults Menu to configure power-on default settings, and the Diagnostic Mode to obtain service-related information about the monitor.

Power-up Defaults Menu

The purpose of the Power-up Defaults Menu is to allow the authorized user to create a power-up default for each setting in the monitor. Power-up defaults are the settings in effect each time the monitor is powered on. Once the Power-up Defaults Menu is entered, physiological monitoring is terminated. The screen layouts do not display any information associated with normal monitoring operation.

Use the following procedure to configure the power-up default settings for the monitor:

1. Set the monitor to normal monitoring mode.2. Adjust each accessible setting on the monitor as desired.

Note Use the techniques described in the User Guide. Such settings include alarm limits, choice of display type for the graphic frames, and ECG lead select.

3. Use the wheel to invoke the Set-up Menu (choose the screwdriver icon

found along the bottom of the display).

4. Select menu item Enter Power-Up Defaults Menu. Once selected, a pop-up box will appear with the text Enter 3-Digit Passcode.

5. Use the wheel to enter the passcode, 2 1 5.

Note This passcode is set at the factory and cannot be changed.

6. The Power-up Defaults Menu is now present. The available menu items are explained below. Make changes to these menu items as desired.

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Power-up Defaults Menu

Menu Item* Choices** Explanation

Accept Current Settings as Power-Up Defaults?

Yes

No

If Yes is chosen, the current monitor settings become the power-up defaults.

Adult/Neonatal Mode (A3 only)

Neonatal mode is not available at this time; thus, when this item is selected, the following pop-up message will appear:Selection not available.

Alarm Silence Period 30 s, 60 s,90 s, 120 s

Time is indicated in seconds. Pressing the front-panel Alarm Silence button temporarily silences audible alarms for the time indicated in the Silence Period menu item. Alarm state(s) in effect at the end of the pre-set interval cause the audible alarm to sound. Pressing the Alarm Silence button a second time (while the silence interval is still in effect) ends the interval immediately. Silencing audible alarms does not affect visual alarm indications.

Permanent Audible Alarm Silent

Make Available

Deny Access

If Make Available is chosen, the caregiver may permanently silence the audible alarm for a particular parameter via the Alarm/Limits Menu. Some institutions may wish to prevent audible alarms from being permanently silenced. If so, Deny Access should be selected.

Alarm Suspend Make Available

Deny Access

If Make Available is chosen, the caregiver may invoke the Alarm Suspend Mode by pressing and holding the Alarm Silence button for 2 seconds. Some institutions may wish to prevent Alarm Suspend from being invoked. If so, Deny Access should be selected.

Auto-Set Limits Make Available

Deny Access

If Make Available is chosen, the caregiver may invoke the Auto-Set Limits function via the Alarm/Limits Menu. Some institutions may wish to prevent Auto-Set Limits from being invoked. If so, Deny Access should be selected.

SpotCheck Mode(A1 only)

Deny Access

Make Available

If Make Available is chosen, the caregiver will invoke the SpotCheck Mode as one of four choices available through the Display icon in the Menu Frame. The factory default is to Deny Access, allowing only three choices available through the Display icon in the Menu Frame.

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Power-up Defaults Menu

7. After making any desired changes to the menu items, choose the menu item Accept current setting?

8. Select YES.

9. Select Done.

Upon selecting Done, a Notice Screen appears, with the directions that the monitor must be powered off, and that any changes made to the power-up defaults are in effect the next time the unit is powered up.

Language*** EnglishFrenchGermanItalianJapanesePortugueseSpanishRussianChinese

DutchTurkishArabicNorwegianSwedishFinnishPolishCzech

The language selected will be used for all the text shown on the display; the selected language will be effective the next time the monitor is powered up.Note: Language selection screen upon

boot up can be reactivated by following the steps listed in the section Restoring Factory Settings.

Enter Diagnostic Mode

Yes

No

If Yes is chosen, the Power-up Defaults Menu is exited and the Diagnostic Menu appears.

Done When selected, the Power-up Defaults Menu is immediately exited and the user is instructed to power down the monitor.

* The choice in effect at the time the screen is accessed is shown in parentheses following the menu item.

** Bold type indicates the choice when the factory-set default menu appears. The highlighting is displayed in reverse video.

*** Although the language choices are shown here in English, they appear in their own respective language and script on the Boot Up Screen and in the Power-up Defaults Menu.

Menu Item* Choices** Explanation

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Diagnostic Mode

Diagnostic Mode

The purpose of Diagnostic Mode is to allow factory, field-service, and hospital biomedical technicians access to a series of test and system-related information screens for the purpose of verifying monitor performance or troubleshooting problems.

To access the Diagnostic Mode:

1. Invoke the Power-up Defaults Menu. (See �Power-up Defaults Menu� on page 37.).

2. Select the menu item, Enter Diagnostic Mode.

3. Choose Yes. The Power-up Defaults Menu is exited and the Diagnostic menu appears.

The Diagnostic Menu lists the test and system-related information screens. Selection of an item in the menu invokes that test or information screen. The test and information screens that appear in the Diagnostic menu are as follows:

� Error Codes� System Information� System A/D Values� NiBP Test� Return

Error Codes

This screen displays the 10 most recent error code types, logged by the monitor. After 10 error code types have been logged, the oldest error code type is deleted as new error code types are added. Adjacent to each error code is an entry which is the number of occurrences of that error. This means that if there are many occurrences of one type of error code, that one error code won�t overwrite the other 9 error codes.

Next to the occurrence field is the time and date of the most recent occurrence of the

DIAGNOSTIC MENU

Error Codes

System Information

System A/D Values

NiBP Test

Return

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Diagnostic Mode

error code. Error codes cannot be changed or reset in this screen. When in the Error Code screen, the Return item is always highlighted; a press of the wheel returns the user to the Diagnostic Menu. Rotating the wheel while in the Error Code screen has no effect.

Refer to �Error Codes�, Chapter 5, for more detail on error codes.

System Information

This screen displays several system-related items:

� Monitor On-time: Displays the number of hours, rounded to the nearest hour, that the Main PCB has been operational. This value cannot be reset.

Note The Monitor On-time, Backlight On-time, and Battery Deep Discharge values are stored in nonvolatile memory. When a new Main PCB is installed, this value is reset to zero.

� Backlight On-time: Displays the number of hours, rounded to the nearest hour, that the LCD Backlight has been operational. This value can be reset to zero, for instance at the time when a technician changes the backlight or installs a new LCD.

� Recorder On-time: Displays the number of hours, rounded to the nearest hour, that the A3 Recorder has been

SYSTEM INFORMATIONMonitor On-Time 1563

Backlight On-Time 871

Recorder On-Time1

1. A3 only

37

Battery Deep Discharges 152

System Software Version V1.02

SpO2 Software Version V1.2.0

Return

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Diagnostic Mode

operational. This value can be reset to zero, for instance at the time when a technician installs a new recorder.

� Battery Deep Discharges: Displays the number of deep-discharge cycles seen by the battery. The monitor records a deep discharge cycle when the battery volt-age reaches 5.6 volts, the voltage at which a Low Battery alarm is issued. This value can be reset to zero, for instance at the time when a technician installs a new battery.

� System Software Version: Displays the revision level of the system software. The revision level is also momentarily shown on the LCD as part of the Copyright screen. This value cannot be changed by the user.

� SpO2 Software Version: Displays the revision level of the software of the MP-205 SpO2 module. This value cannot be changed by the user.

When in the System Information screen, the wheel can be rotated to select any of the changeable items. If one of those items is selected, a press of the wheel causes a pop-up menu to appear. The first item in the pop-up reads Make no change; the second item in the pop-up reads Reset to zero. Exiting the screen is accomplished in the normal manner, by selecting Return.

System A/D Values

The System A/D screen displays the current value of each analog-to-digital (A/D) channel in volts. Some of the channels are for AC-coupled signals (such as ECG input), so the numbers on the screen are constantly changing when an input signal is present. These AC-coupled values are shown to give an indication as to whether basic functionality of the channel is present, but no significance can be derived from the values of the numbers displayed. However, others of the A/D channels read DC voltages, (for example, power supply voltages and battery voltage) and those voltage values directly provide useful diagnostic information.

The Primary and Secondary Status messages from the SpO2 module are displayed and updated at the rate of about once per second. Presence of the correct SpO2 message indicates that, at a basic level, communication between the SpO2 module and the main monitor processor is working correctly. None of the displayed values can be changed or reset in this screen.When in the System A/D screen, the Return item is always highlighted; a press of the wheel returns the user to the Diagnostic Menu. Rotating the wheel while in the System A/D screen has no effect. The A/D channel designators are shown below.

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Diagnostic Mode

NIBP Test

Warning A blood pressure cuff, connected to the monitor, should never be applied to a human subject while the monitor is in Diagnostic Mode. Injury could result.

A/D Channel Designators

A1 A31. ECG 1. ECG2. RWAVE 2. RWAVE3. PACEMAKER 3. PACEMAKER4. TEMP 1 (93° TO 112°) 4. RESPIRATION5. PRESSURE XDUCER 1 5. PRESSURE XDUCER 16. PRESSURE XDUCER 2 6. PRESSURE XDUCER 27. NiBP OSCILLATORY 7. NiBP OSCILLATORY8. ECG LEAD OFF 8. ECG LEAD OFF9. TEMP 2 (59° TO 93°) 9. TEMPERATURE10. ISOLATED VOLTAGE REF 10. ISOLATED VOLTAGE REF11. ISOLATED VOLTAGE ZERO 11. ISOLATED VOLTAGE ZERO

SpO2 S1 S018 SpO2 S1 S01812. (BATTERY VOLTAGE) X 0.5 12. (BATTERY VOLTAGE) X 0.513. TEMP PROBE <=0=ORAL,

1=RECTAL, 2=CAL KEY,>=3 NONE)

13. NOT USED

14. +3.3 VDC POWER SUPPLY 14. +3.3 VDC POWER SUPPLY15. (NiBP VOLTAGE REF) X 0.5 15. (+12 VDC POWER SUPPLY) X

0.3316. GROUND REFERENCE 16. (NiBP VOLTAGE REF) X 0.817. (+5 VDC POWER SUPPLY) X 0.5 17. GROUND REFERENCE18. ADC MID-SCALE VALUE 18. (+5 VDC POWER SUPPLY) X 0.819. ADC ZERO-SCALE VALUE 19. ADC MID-SCALE VALUE20. ADC FULL-SCALE VALUE 20. ADC ZERO-SCALE VALUE

21. ADC FULL-SCALE VALUE

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Diagnostic Mode

An NiBP Test screen is provided to facilitate troubleshooting problems and performing verification testing for the NiBP subsystem. Typically, when these tests are performed, the pneumatic system is connected to an external pressure-reading device and a closed reference volume. The NiBP Test screen provides a real-time numeric display of the pressure in the pneumatic system, means for controlling the pump and valves, and a display indicating whether the proportional and safety valves are open or closed.

The NiBP Test screen elements are described below:

� Pressure Display: The real-time value of the system pneumatic pressure is displayed in mmHg. The value is updated at the rate of approximately two times per second.

� Proportional Valve The display indicates whether theDisplay: proportional valve is open or closed.

� Safety Valve Display: The display indicates whether the safety valve is open or closed.

� Activate Pump: For as long as the NiBP Start/Stop button

is pressed, the pump runs. If system pressure reaches the hardware over-pressure protection point (280 to 330 mmHg), the safety valve opens and the pump disables, until the pressure falls below the safety threshold.

� Deflate: For as long as the ALARM SILENCE button

NiBP TESTPressure (mmHg) 179

Valve: OPEN

Press NiBP to activate pump;release to stop pump.

Press Volume to open valve; release to close valve.

Press Alarm Silence to openproportional valve and deflate at3 mmHg/s; release to close valve.

Press Contrast to perform offsetadjust.

Return

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Restoring Factory Settings

is pressed, the proportional valve opens and bleeds off pressure at the rate of 3 ±1.5 mmHg/s. It is useful to control the bleed rate to 3 mmHg/second to facilitate certain AAMI SP10 tests. Any time the bleed rate falls below 3 mmHg/second, the valve opens and remains at maximum as long as the button is pressed.

� Open Valve (A1): While the Heart Rate Tone VOLUME button

is pressed, the valve opens and remains at maximum as long as the button is pressed.

� Open Both Valves (A3): For as long as the Heart Rate Tone VOLUME

button is pressed, the safety valve and

proportional valve opens and remains at maximum as long as the button is pressed.

� Offset Adjust: A momentary press of the CONTRAST ADJUST

button invokes the zero calibration

routine that is performed immediately prior to each blood pressure measurement. This routine looks at the pressure in the system, and if the pressure is non-zero, an offset is applied which causes the system pressure to display as zero.

When in the NiBP Test screen, the Return item is always highlighted; a press of the wheel returns the user to the Diagnostic Menu. Rotating the wheel while in the NiBP Test screen has no effect.

Restoring Factory Settings

Caution In addition to restoring factory defaults, this procedure clears the contents of trend memory.

Note Read this procedure completely before performing the first step.

The following technique can be used to restore the monitor�s power-up default

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Restoring Factory Settings

settings which were originally established at the factory:

1. With the monitor powered off, simultaneously press the VOLUME and

CONTRAST buttons on the front keypad.

2. While continuing to press the VOLUME and CONTRAST buttons, power-

up the monitor.

3. Continue to keep the VOLUME and CONTRAST buttons depressed until

the power-up diagnostic sequence is complete. When the normal monitoring screen appears, release the two buttons.

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5Troubleshooting

Introduction

This section explains how to troubleshoot the monitor if problems arise. Tables are supplied that list possible monitor difficulties, along with probable causes, and recommended actions to correct the difficulty.

How To Use This Section

Use this section in conjunction with Chapter 3, �Performance Verification�, and Chapter 7, �Spare Parts�. To remove and replace a part you suspect is defective, follow the instructions in Chapter 6, �Disassembly Guide�. The Circuit Analysis chapter in the Concepts Guide offers information on how the monitor functions.

Who Should Perform Repairs

Only qualified service personnel should open the monitor housing, remove and replace components, or make adjustments. If your medical facility does not have qualified service personnel, contact Philips� Response Center or your local Philips representative.

Replacement Level Supported

The replacement level supported for this product is to the printed circuit board (PCB) and major subassembly level. Once you isolate a suspected PCB, follow the procedures in Chapter 6, �Disassembly Guide�, to replace the PCB. Check to see if the symptom disappears and that the monitor passes all performance tests. If the symptom persists, swap back the replacement PCB with the suspected malfunctioning PCB (the original PCB that was installed when you started troubleshooting) and continue troubleshooting as directed in this section.

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Obtaining Replacement Parts

Obtaining Replacement Parts

Philips� Response Center provides technical assistance information and replacement parts. To obtain replacement parts, contact your local Philips representative. Refer to parts by the part names and part numbers listed in Chapter 7, �Spare Parts�.

Troubleshooting Guide

Problems with the monitor are separated into the categories indicated below. Refer to the section indicated for further troubleshooting instructions.

Taking the recommended actions discussed in this section will correct the majority of problems you may encounter. However, problems not covered here can be resolved by calling Philips� Response Center or your local representative.

All categories listed above are discussed in the following sections.

Power

The following table lists recommended actions to address A1 power

Problem Area Refer To:

1.Power � No power-up� Fails power-on self-test� Powers down without apparent cause

�Power� on page 48

2.Error Messages �Error Codes� on page 51

3.Buttons/Wheel� Monitor does not respond properly to buttons

�Buttons/Wheels (All Monitors)� on page 56

4.Display/Audible Tones � Display does not respond properly� Tones do not sound properly

�Display/Audible Tones (All Monitors)� on page 57

5.Operational Performance� Displays appear to be operational, but monitor

shows no readings� Suspect readings� Recorder not responding

�Operational Performance� on page 58

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problems.

Condition Recommended Action

1.With external power supply connected the green EXTERNAL POWER indicator

on the front panel is not lit.

1.Ensure that the external power supply input (PS-120V or PS-240V) is plugged into an operational AC outlet of appropriate voltage and frequency.

2.Disconnect the power supply output cable from the monitor. Measure the voltage across pins 1 and 4 of output connector. If the open circuit voltage does not measure approximately 17 ±3 V~RMS, replace the power supply.

3. If the battery is severely discharged or shorted, the EXTERNAL POWER indicator does not light. Connect the external power supply to an AC outlet and to the monitor. Allow the battery to charge for 30 minutes. If the EXTERNAL POWER indicator still does not light, replace the battery.

4. Inside the monitor, check the ribbon cable and ensure that it is properly connected to the main PCB.

5.The EXTERNAL POWER indicator is embedded in the keypad. Ensure that the keypad is plugged into Main PCB. If the connection is good, replace the keypad.

6. If the problem persists, replace main PCB.

2.The A1 fails to power-up when the ON/STANDBY button is pressed�with the monitor connected to external power supply.

1.Connect the appropriate external power supply (PS-120V or PS-240V) to the monitor. Ensure that the external power supply input is plugged into an operational AC outlet of the appropriate voltage and frequency. Ensure that the green EXTERNAL POWER indicator is lit. If the indicator is not lit, follow the steps described in Condition 1, above.

2.Ensure that the keypad is plugged into Main PCB. If the connection is good, replace keypad.

3. If the problem persists, replace the main PCB.

3.The A1 fails to power-up when the ON/STANDBY button is pressed with the monitor not connected to external power supply.

1. First, follow the steps described in Condition 2, above, to ensure that the monitor operates when connected to an external power supply.

2.Check fuse F301 located on the Main PCB, near the battery cable connector. Replace fuse if necessary.

3.Recharge the battery as directed in �Battery Charge� on page 11. If the battery fails to hold a charge, replace the battery.

4. If the problem persists, replace the main PCB.

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Troubleshooting Guide

The following table lists recommended actions to address A3 power problems.

4.The A1 turns on, then shuts off and sounds an alarm and no error code is displayed.

1.Press the alarm silence button to terminate the audible alarm. Ensure that the external power supply is connected and the green EXTERNAL POWER indicator is lit. If the monitor operates successfully, the battery could be discharged, or the battery fuse could be blown.

2.Recharge the battery as directed in �Battery Charge� on page 11. If the battery fails to hold a charge, replace the battery.

3.Check fuse F301 located on the Main PCB, near the battery cable connector. Replace the fuse if necessary.

4. If problem persists, replace the main PCB.

Condition Recommended Action

1.The A3 fails to power-up when the ON/STANDBY button is pressed.

1.Ensure power cord is plugged into operational AC outlet of appropriate voltage and frequency. Ensure green BATTERY CHARGING/AC SOURCE indicator is lit. If indicator is not lit, replace power supply assembly.

2.Check fuses located on power supply assembly above AC inlet receptacle. Replace fuses if necessary.

3. Inside monitor, check main ribbon cable and ensure that it is connected to main PCB and power supply assembly.

4.Ensure that the keypad is plugged into Main PCB. If the connection is good, replace the keypad.

5. If the problem persists, replace main PCB.

Condition Recommended Action

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Troubleshooting Guide

Error Codes

When the monitor detects an error condition, the monitor shows an error code on the display screen. If such an error occurs during monitoring operation, an

audible alarm tone also sounds. Press the ALARM SILENCE button to terminate the audible alarm tone.

When an error code appears on the display, a number in hexadecimal representation indicates the nature of the error. Additionally, Diagnostic Mode can be used to gain access to an error code record, stored in nonvolatile memory, of the last 10 error codes encountered by the monitor. See Chapter 4 for further details on Diagnostic Mode.

Each error code corresponds to a particular problem in the monitor. Recommended actions to take when an error code is encountered are listed in the sections that follow.

As an aid to troubleshooting, the A1 provides the capability for technicians to print out a copy of the error log.

Generating an Error Log Printout (A1 only)

1. Connect the recorder to the monitor, and its power supply to an appropriate source. Refer to the operator�s manual.

2. Use the SETUP button and displayed menu to verify that the Recorder mode is the selected option for the Communications Selection item. (It is the factory-set default value.)

3. Turn monitor power OFF.

2.The A3 turns on, then shuts off and sounds an alarm and no error code is displayed.

1.Press Alarm Silence switch to terminate audible alarm. Ensure AC power cord is connected and green BATTERY CHARGING/AC SOURCE indicator is lit, or ensure DC source is connected and green BATTERY CHARGING/DC SOURCE is lit. If monitor operates successfully, battery can be discharged.

2.Recharge the battery as directed in �Battery Charge� on page 11. If the battery fails to hold a charge, replace the battery.

3. If the problem persists, replace the main PCB.

4. If the problem persists, replace the power supply assembly.

Condition Recommended Action

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Troubleshooting Guide

4. Simultaneously press the CONTRAST button and the ON/

STANDBY button to power up the monitor. Keep the contrast button depressed until the monitoring screen appears (after 10 seconds). The error code printout is generated automatically.

If error codes listed on the Diagnostic Mode error code screen or on the error log printout are in the range from 1 to 65 (hex), a hardware problem has been detected. Refer to the section titled, �Serviceable Hardware Error Codes� for additional information on these codes.

Serviceable Hardware Error Codes

Serviceable HardwareError Codes for A1

Listed below are error codes for the A1 that correspond to hardware problems, and the recommended actions to take should such an error be encountered.

Hex Code Explanation Recommended Action

1 Improper shutdown. 1.Cycle power.2. If this error persists, return

monitor for service.

2 NiBP Sensor Error.� The two pressure system.

transducers do not agree.

1.Check for blocked tubing in the pneumatic system.

2.Replace Main PCB.

3 NiBP Pressure Violation Error.� The pressure on the cuff

could not be removed by normal means.

� A fault has been detected in the NiBP system that could not be handled by releasing pressure by normal means.

1.Cycle power.2.Check for blocked tubing in

the pneumatic system.3.Replace Main PCB.

4 The measured value of the 3.3V power supply is low.

1.Check power supply.2.Replace Main PCB.

5 The measured value of the 3.3V power supply is high.

1.Check power supply.2.Replace Main PCB.

7 The measured value of the 12V power supply is high.

1.Check power supply.2.Replace Main PCB.

8 The measured value of the 5V power supply is low.

1.Check power supply.2.Replace Main PCB.

9 The measured value of the 5V power supply is high.

1.Check power supply.2.Replace Main PCB.

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Serviceable HardwareError Codes for A3

IListed below are error codes for the A3 that correspond to hardware problems, and the recommended actions to take should such an error be encountered.

A The measured value of the isolated reference supply on the front end is low.

1.Check power supply.2.Replace Main PCB.

B The measured value of the isolated reference supply on the front end is high.

1.Check power supply.2.Replace Main PCB.

D A checksum error is detected on the NiBP region of Flash Memory.

1.Cycle power.2. If error persists, replace

main PCB.

E A checksum error is detected on the power-up settings region of Flash memory.

1.Turn Power Off.2.Turn power back on while

pressing both the CONTRAST and VOLUME buttons. See �Restoring Factory Settings� on page 45, Chapter 4.

3.All user selections must be restored.

4. If error persists, replace Main PCB.

64 The SpO2 module is sending an error message to the host CPU.

1.Cycle power.2. If problem persists, replace

Main PCB.

65 The SpO2 module is not communicating with the host CPU.

1.Cycle power. 2. If problem persists, replace

main PCB.

Hex Code Explanation Recommended Action

Hex Code Explanation Recommended Action

1 Improper shutdown. 1.Cycle power.2. If this error persists, return

monitor for service.

2 NiBP Sensor Error.� The two pressure system.

transducers do not agree.

1.Check for blocked tubing in the pneumatic system.

2.Replace Main PCB.

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Troubleshooting Guide

3 NiBP Pressure Violation Error.� The pressure on the cuff

could not be removed by normal means.

� A fault has been detected in the NiBP system that could not be handled by releasing pressure by normal means.

� NiBP system has released pressure using safety valve.

1.Cycle power.2.Check for blocked tubing in

the pneumatic system.3.Replace Main PCB.

Note: This error may occur during a blood pressure measurement in STAT mode, if the leg cuff is used.

4 The measured value of the 3.3V power supply is low.

1.Check power supply.2.Replace power supply

assembly.

5 The measured value of the 3.3V power supply is high.

1.Check power supply.2.Replace power supply

assembly.

6 The measured value of the 12V power supply is low.

1.Check power supply.2.Replace power supply

assembly.

7 The measured value of the 12V power supply is high.

1.Check power supply.2.Replace power supply

assembly.

8 The measured value of the 5V power supply is low.

1.Check power supply.2.Replace power supply

assembly.

9 The measured value of the 5V power supply is high.

1.Check power supply.2.Replace Main PCB.

A The measured value of the isolated reference supply on the front end is low.

1.Check power supply.2.Replace Main PCB.

B The measured value of the isolated reference supply on the front end is high.

1.Check power supply.2.Replace Main PCB.

C The measured value of the isolated reference supply on the front end is high.

1.Check power supply.2.Replace Main PCB.

64 The SpO2 module is sending an error message to the host CPU.

1.Ensure MP-205 module is properly connected.

2.Replace MP-205 module.3. If problem persists, replace

Main PCB.

Hex Code Explanation Recommended Action

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Troubleshooting Guide

Other Error Codes (All Monitors)

If an error code occurs that is not listed in �Serviceable Hardware Error Codes�, take the following actions:

1. Turn the monitor off, then on again.2. If the error code still appears, take the monitor out of service and contact

Philips� Response Center or your local Philips representative for advice on remedial action.

3. If the monitor powers up and the error code does not recur, enter the Diagnostic Mode and invoke the Error Code screen. Examine the record of the last 10 error codes and determine if the same error code occurred previously.

4. If the Error Code screen indicates that the same error has occurred previously, take the monitor out of service and contact Philips� Response Center or your local Philips representative for advice on remedial action.

5. If the Error Code screen indicates no previous occurrences of this error, the monitor can be returned to service.

As a reference, following lists the general categories for other error codes. The error code categories are shown only in hexadecimal format.

65, 66 MP-205 SpO2 module has detected an error during initialization.

1.Replace MP-205 module.2. If problem persists, replace

Main PCB.

6E-71 MP-205 SpO2 module has detected an error on its serial port.

1.Replace MP-205 module.2. If problem persists, replace

Main PCB.

Hex Code Explanation Recommended Action

Code (hex) Explanation

500xxxx internal user interface error

501xxxx remote serial port error

502xxxx date and time error

503xxxx NiBP error

504xxxx front end error

505xxxx alarm error

506xxxx audio error

507xxxx recorder error

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Troubleshooting Guide

Buttons/Wheels (All Monitors)

The following lists recommended actions to address problems with the wheel and front-panel buttons.

508xxxx trend error

509xxxx flash memory data error

50axxxx SpO2 error

50bxxxx ECG error

50cxxxx power-down task error

50dxxxx on-board diagnostic error

50exxxx power monitor error

50fxxxx temperature measurement error

510xxxx internal user interface error

511xxxx error handling error

513xxxx serial driver error

514xxxx system software errors (A1 only)

Code (hex) Explanation

Condition Recommended Action

1.The monitor fails to power-up when the ON/STANDBY button is pressed.

1.Take steps as noted in �Power� on page 48.

2.The monitor powers-up, but some/one of the other buttons does not respond.

1.Ensure that the keypad is plugged into the Main PCB. If the connection is good, change the keypad.

2. If the problem persists, change the Main PCB.

3.When the wheel is rotated, no highlight appears on the display screen, and/or the monitor does not respond to wheel presses.

1.Ensure that the encoder cable is plugged into the Main PCB. If the connection is good, change the encoder.

2. If the problem persists, replace the Main PCB.

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Troubleshooting Guide

Display/Audible Tones (All Monitors)

The following lists recommended actions to address problems with the display and audible tones.

Condition Recommended Action

1.System powers-up and�� LCD screen is totally

black or white.Or,

� LCD screen is illuminated, but no data is visible.

Or,� LCD screen has data,

but is not illuminated.

Note: Pressing the A3 contrast adjust switch causes the LCD contrast setting to immediately change to normal, factory-default value. Pressing the A3 contrast adjust switch toggles the display between the two different color schemes (black background and white background).

1.A1 and A3: Adjust the LCD screen contrast by pressing the CONTRAST button momentarily, then turning the wheel four revolutions in each direction. Turning the wheel clockwise should brighten the screen; turning the wheel counter-clockwise should darken the screen.

2.A3: Ensure red LED, located on the top left corner of the Main PCB, is illuminated. If the LED is not illuminated, the monitor is not in on state: follow troubleshooting steps in �Power� on page 48.

3.Ensure that the backlight cable is connected to the Main PCB.

4.Ensure that the LCD connector is properly connected to the Main PCB and LCD PCB.

5. If problem persists, replace Main PCB.6.A3: If problem persists, replace backlight PCB.7. If problem persists, replace LCD assembly.

2.Monitor responds to button press, but key press tone fails to sound.

1.Ensure that the speaker cable is connected to the Main PCB.

2. If the problem persists, replace the speaker assembly.

3. If the problem persists, replace the Main PCB.

3.Audible alarm does not sound.

1.Verify alarm volume setting in the Alarm/Limits menu, and test operation of the alarm tone by pressing the volume button while the alarm volume setting is displayed.

2.Ensure that the speaker cable is connected to the Main PCB.

3. If the problem persists, replace the speaker assembly.

4. If the problem persists, replace the Main PCB.

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Operational Performance

OperationalPerformance

Problems - A1

The following lists recommended actions to address problems related to operational performance of the A1.

OperationalPerformance

Problems - A3

The following lists recommended actions to address problems related to operational performance of the A3.

Condition Recommended Action

1.The monitor appears to be operational, but the physiological values are suspect or nonexistent.

1.Replace each patient cable (or tubing) with a known good cable.

2.Ensure that the Patient Connector PCB is properly connected to the Main PCB. Ensure that the tubing in the pneumatic system are properly connected, and that the NiBP pump motor is connected to the Rear Connector PCB.

3. If the problem persists, replace the Patient Connector PCB.

4. If the problem persists, replace Main PCB.

Condition Recommended Action

1.Monitor appears to be operational, but physiological values are suspect or nonexistent.

1.Replace each patient cable (or tubing) with a known serviceable cable.

2.Ensure internal ECG, temperature, and SpO2 cables are connected to Main PCB. Ensure tubing in pneumatic system are properly connected, and NiBP pump motor is connected to power supply PCB.

3. If problem persists, replace main PCB.

2.Recorder paper will not advance.

1.Open recorder door and check paper is present. Press recorder module firmly into monitor to ensure recorder module is fully engaged with connector on recorder PCB.

2.Cycle power on monitor. Recorder should execute a line feed at conclusion of power-up sequence.

3. If problem persists, ensure main ribbon cable is connected to printer PCB, power supply and Main PCB.

4. If problem persists, replace recorder.5. If problem persists, replace recorder PCB.6. If problem persists, replace Main PCB.

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Troubleshooting Guide

3.Recorder paper will advance but paper remains blank when printing should be present.

1.Open recorder door and check paper is oriented correctly; paper should exit from bottom of roll. See User Guide for an illustration of correct paper orientation.

2. If problem persists, replace recorder.

Condition Recommended Action

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6Disassembly Guide

Warning Performance verification: do not place the monitor into operation after repair or maintenance has been performed, until all recommended Performance Tests and Safety Tests listed in Chapter 3 of this service manual have been performed. Failure to perform all tests could result in erroneous monitor readings.

Introduction

The monitor can be disassembled down to all major component parts, including:

� PCBs� battery� cables� function buttons� chassis enclosuresThe following tools are required:

� small/medium, Phillips-head screwdriver� needle-nose pliers� 9/16-inch socket (for wheel encoder)� 3/16-inch socket (for rear-panel RS-232 connector).

Warning Before attempting to open or disassemble the monitor, disconnect the power supply from the monitor.

Warning High voltage is generated by the LCD backlight driver. Exercise caution when operating the monitor with the covers open.

Caution Observe ESD (electrostatic discharge) precautions when working within the unit.

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How To Use This Chapter

Caution If the internal battery cable has been disconnected, pay particular attention to the polarity of the cable before reattaching. If the battery cable polarity is reversed, it is likely that circuit damage will occur.

How To Use This Chapter

The step-by-step procedures that are used to access replaceable parts of the monitor are illustrated in the Disassembly sections which follow. These describe and photographically illustrate procedures for disassembling the monitor to enable removal and replacement of suspected defective assemblies/components.

The monitor consists of two main assemblies, the front case assembly, and the rear case assembly. The main PCB assembly is separable from the front case assembly.

All part numbers and exploded views of some assemblies are found in Chapter 7, �Spare Parts�.

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Disassembly Procedures (A1)

Disassembly Procedures (A1)

Closed Case Disassembly Procedures

This section describes the items that can be removed without disassembling the main case of the A1 monitor.

Procedure to remove the battery from Models M3921A and M3923A when a temperature module is not installed:

1. Use a Phillips-head screwdriver to remove the two screws fastening the battery cover to the rear case.

2. Remove the battery cover.3. Disconnect the spade terminal connectors from the battery terminals.

Caution During reassembly, pay particular attention to the polarity of the battery cable before reattaching. The polarity is marked on the circuit board. Red connects to the +ve terminal, black connects to the �ve terminal. If battery cable polarity is reversed, it is likely that circuit damage will occur.

4. Remove the battery.

Batterypad

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Disassembly Procedures (A1)

5. As required, remove the battery cushions on the inside of the battery compartment, and the battery cover.

Procedure to remove the battery from the monitor when a temperature module is installed:

1. Use a Phillips-head screwdriver to remove the two screws fastening the temperature module housing to the rear case assembly. The same screws also hold the battery cover.

Footcushions

Batterycover

For models with temperature module

Tempmodule

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Disassembly Procedures (A1)

2. Remove the temperature module housing and the battery cover.

3. The probe sensor contact switch is mounted on the outer side of the battery cover. As required, disconnect the leads from the probe sensor switch to the rear panel connector.

4. Remove the switch.

5. Disconnect the spade terminal connectors from the battery terminals.

Caution During reassembly, pay particular attention to the polarity of the battery cable before reattaching. The polarity is marked on the circuit board. Red connects to the +ve terminal, black connects to the �ve terminal. If battery cable polarity is reversed, it is likely that circuit damage will occur.

6. Remove the battery.7. As required, remove the battery cushions on the inside of the battery

Removedtemperaturemodulehousing

Batterycover

Temperatureprobe grommet

Spare probesensor switch

Probe sensorswitch

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Disassembly Procedures (A1)

compartment, and the battery cover.

Separation of Front and Rear Case Assemblies

This section describes the procedures required to separate the front and rear case assemblies of the A1 monitor.

Procedure to separate the front and rear case assemblies:

1. Remove the SpO2 connector hood by squeezing the sides to release the detents holding the hood in place.During reassembly, the notch on the SpO2 connector hood should be facing down.

2. Use a Phillips-head screwdriver to remove the four screws fastening together the front and rear case assemblies.

3. Separate the main front and rear case assemblies.4. If the rear cover gasket seal is to be replaced, remove it.

Footcushions

Batterycover

SpO2connectorhood

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Disassembly Procedures (A1)

During reassembly, align the ridge in the front case assembly with the groove in rear case assembly. The gasket snake break should be placed at the bottom of the unit. Line up the connector panel with the slots in the rear case, making sure speaker wire is out of the way. Power up the monitor prior to installing the final four screws. If the monitor boots properly, insert the four screws and proceed to the performance tests.

5. Disconnect the ribbon cable and its connector from the PCB assembly.

6. Disconnect the battery cable spade terminals from the main PCB assembly. If the battery cable is to be removed, the cable must also be disconnected from the battery.

Front caseassembly

Rear caseassembly

Ribbon cableandconnector

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Disassembly Procedures (A1)

Caution During reassembly, pay particular attention to the polarity of the battery cable before reattaching. The polarity is marked on the circuit board. Red connects to the +ve terminal, black connects to the �ve terminal. If battery cable polarity is reversed, it is likely that circuit damage will occur.

7. Unscrew the NiBP Luer connector.During reassembly, preload the NBP Luer connector by twisting the silicone NBP tubing in opposite directions prior to making the Luer connection. This prevents disconnection.

Front and rear case assemblies are now completely separate from one another.

Front Case Disassembly Procedures

This section describes how to remove/replace items from the front case assembly. First separate the front and rear assemblies as described in the section �Separation of Front and Rear Case Assemblies� on page 78.

Procedure to remove the main PCB assembly from the front case assembly:

1. Use a Phillips-head screwdriver to remove the screw holding the main PCB assembly in place in the front cover assembly.For reassembly, note the two guides in the cover and the corresponding two notches in the PCB.

Luer connectorto NiBP pumptubing

Batterycable

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Disassembly Procedures (A1)

2. Remove the board by gently pulling to disconnect from LED connector. Pull straight back to avoid bending the pins.During reassembly, line up the LED connector when replacing the main PCB in the front case assembly, press gently into position, and feed the ribbon cable through the hole for the wheel.

3. Disconnect the backlight, keypad, speaker connector, and wheel ribbon connector.During reassembly, tuck the speaker cable out of the way.

There are now three separate items:

� Front case assembly� Rear case assembly� Main PCB assembly

Main PCBassembly

Front caseassembly

Rear caseassembly

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Disassembly Procedures (A1)

Procedure to remove the display:

Caution Perform this step in a dust-free environment to avoid damage to the LCD display.

1. Use a Phillips-head screwdriver to unfasten the four corner screws. These screws also hold the LCD assembly in place.

2. Remove the display shield.

3. Remove the LCD assembly, providing access to the display window.4. Remove the display window by carefully prying up one corner and then

peeling back.

Backlightconnector

Keypad cableand connectorSpeaker

connector

Wheelencoderassembly

LCDassembly

PCB

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Disassembly Procedures (A1)

Procedure to remove the speaker:

1. Remove the retaining spring clip.2. Remove the speaker.3. Orient the speaker wires towards the handle (as shown in the

photograph).

Procedure to remove the wheel and encoder:

1. From the front, remove the wheel by grasping the sides of the wheel firmly and pulling straight back from the monitor. (The wheel is friction fit on the stem of the encoder assembly).If the wheel is not easily removable by hand, a small flat-headed screwdriver can be used to gently pry off the wheel. If necessary, apply some adhesive tape to the front cover and the head of the screwdriver to prevent any damage.

2. Use a 9/16� hex socket to unscrew the fastening nut on the outside of the front case. The encoder can now be pulled away from the front case.During reassembly, orient the ribbon connector so that the cable lies parallel to the bottom of the board and pin 1 is oriented close to the handle.

Sparespeaker,leadsattached

Handle

Nut

EncoderassemblySpare

wheel

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Procedure to remove the keypad:

The keypad is attached with an adhesive to the front panel.

1. From the front side of the panel, carefully pry up one corner of the keypad from the cover, and then peel it away from the cover.

2. Carefully thread the cable out through the slot in the cover.

Spare wheel

Keypad, integralcable andconnector

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Disassembly Procedures (A1)

Rear Case Disassembly Procedures

This section describes the items that can be removed or replaced on the rear case assembly of the A1 monitor. First separate the front and rear assemblies as described in the section �Separation of Front and Rear Case Assemblies� on page 78.

Procedure to remove a rear connector PCB:

1. Use a Phillips-head screwdriver to remove the two screws holding the rear connector PCB to the rear cover.

2. From outside the rear cover, use a 3/16 socket driver to remove the two standoff fasteners of the RS-232 connector.

3. From inside the rear cover, remove the rear connector PCB assembly.

Procedure to remove NIBP pump:

1. Use a Phillips-head screwdriver to unfasten the screw holding the clamp to the rear cover.

2. Disconnect the power lead from the rear connector PCB.3. Remove the clamp and the pump.

NiBP pump,tubing and leadattached

Rear connectorboard assembly

NiBP pumpPump powerlead

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Disassembly Procedures (A1)

Procedure to remove handle and foot cushions:

Each end of the handle is friction-fit onto a cross-shaped boss.

1. Use flat-bladed screwdriver to carefully pry one end of the handle.2. When the end of the handle has begun to loosen from the boss, use the

same technique to begin to pry up the other end.3. Alternately apply this prying action between each end of the handle until

the handle is free of the rear case.4. The foot cushions are attached with an adhesive to the bottom surface of

the rear cover, and can be removed by lifting one end of the foot and peeling off.

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Disassembly Procedures (A1)

Main PCB Disassembly Procedures

This section describes the items that can be removed or replaced from the main PCB assembly of the A1 monitor. The main PCB assembly is separable from the front case assembly.

First separate the front and rear assemblies as described in the section �Separation of Front and Rear Case Assemblies� on page 66.

Then perform �Procedure to remove the main PCB assembly from the front case assembly�, page 68.

Procedure to remove NiBP pneumatic assembly from the main PCB assembly:

1. Pull the tubing from the barbed fitting on the rear of the NiBP panel connector.

2. Pull the tubing from the fittings on the the pressure sensors and valve.

Procedure to separate the patient connector PCB assembly from the main PCB assembly:

1. Use needle-nose pliers or a Tinnerman tool to remove the two Tinnerman fasteners securing the patient connector PCB assembly to the underside of the main PCB.

2. Disconnect the patient connector PCB assembly by pulling it straight up from the main PCB.

3. The battery fuse F301, located near the battery cable connector on the main PCB can be replaced if necessary. (The battery fuse is located between the two round yellow poly fuses).

NiBPpneumaticassemblygroup

Pressuresensor

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Disassembly Procedures (A1)

Procedure to separate the patient connector PCB from the connector panel:

1. Use a Phillips-head screwdriver to remove four screws fastening the two assemblies together.Two of the screws are accessible on the face of the connector PCB, two are accessible through access holes in the PCB.

2. Separate the two assemblies.

Patient connector PCB assembly

Foot of moulded connector panel after removal of Tinnerman nut

Main PCBassembly

Connectorpanel

PatientconnectorPCB

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Disassembly Procedures (A3)

Disassembly Procedures (A3)

Closed Case Disassembly Procedures

This section describes the items that can be removed without disassembling the main case of the A3 monitor.

Procedure to remove front panel wheel:

The wheel is friction-fit on the encoder shaft.

1. Grasp the sides of wheel firmly and pull straight back from the monitor. The wheel should slip off the encoder shaft.

2. If wheel does not move, separate front and rear cases as described in �Separation of Front and Rear Case Assemblies� on page 78. There is a hole in the front cover behind the wheel. Insert a small screwdriver blade in the hole and push firmly against the back of the wheel.

Procedure to remove carrying handle:

1. Use screwdriver to remove the two fastening screws and washers. Retain them for reassembly.

2. Remove the handle by sliding it straight back towards the rear of the monitor.

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Disassembly Procedures (A3)

Procedure to remove recorder:

1. Press the Paper Eject button on the right side of the recorder. The door drops forward.

2. Remove the paper roll, if installed. Two fastening screws are visible on the back panel of the recorder.

3. Use a screwdriver to back out the captive fastening screws.4. Pull the recorder straight out of the side of the monitor, disengaging the

connector at the rear of the module from the recorder PCB in the assembly.Note that removal of the recorder PCB can be accomplished only after the front and rear cases are separated.

Separation of Front and Rear Case Assemblies

Procedure to separate front and rear case assemblies:

1. Remove handle as indicated in procedure on page 77.2. Use screwdriver to remove four screws fastening Rear Case Assembly to

Front Case Assembly to Front Case Assembly. Retain for reassembly.Note that the gasket must be inserted around the top of the rear case before reassembly.

3. Separate the two major case assemblies. There is enough cable and tubing slack to permit the two assemblies to remain at an angle of approximately 90 degrees to each other.During reassembly, preload the NBP Luer connector by twisting the silicone NBP tubing in opposite directions prior to making the Luer connection. This prevents disconnection.

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Disassembly Procedures (A3)

4. Disconnect the large ribbon-cable connector from the main PCB.5. Unscrew the NiBP tubing connector from the pump to the main PCB.

The front and rear case assemblies are now completely separate from one another.

Main ribboncable assembly

NiBP tubing Connector to recorder PCB(when installed)

SpO2 module

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Disassembly Procedures (A3)

Front Case Disassembly Procedures

Procedure to remove SpO2 module, ECG/Temp connector assembly, and encoder assembly:

� SpO2 module: remove the three screws located at the corners of the SpO2 module and lift off the ground wire and the foil shield. Then pull the SpO2 module straight up to disengage it from main PCB.

Note Important for reassembly: the insulator goes on the non-foil screw hole. The washers, star-washers, and foil screw holes should be assembled together.

� ECG/Temp cable/connector assembly: unplug the connector from the main PCB. Remove the screws fastening the ECG connector to the front case, rotate the temperature connector counter-clockwise to unscrew it from the fastening nut on outside of the front case. Disconnect the white cable and move the SpO2 front connector ground cable before attempting to disconnect the temperature connector.

� The encoder assembly: unplug the connector from the main PCB. Remove the wheel, as described in step 1A. Use a 9/16� hex socket to unscrew the fastening nut on the outside of the front case. The encoder can then be pulled away from the front case.During reassembly, the ribbon cable should orient towards the PCB, and after connection, the excess should be fed under the PCB.

Procedure to remove the main PCB:

1. Disconnect the connectors from the main PCB for:� Switch panel� SpO2� ECG/Temp� Encoder� LCD (display). Do not cut the tie wrap over the connector, slide it

out of the way to remove the connector.� Backlight

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Disassembly Procedures (A3)

2. Use a screwdriver to remove the six fastening screws around the periphery of the main PCB. Retain the fastening screws for reassembly.

3. Lift the main PCB slightly and unscrew the tubing connector near the NiBP front panel fitting.

4. The main PCB can now be removed. This allows access to the SpO2 front panel connector, NiBP fitting and backlight inverter. These can be removed by removing the appropriate screws or nuts.During reassembly, the backlight inverter cable should be wrapped over the screw post. (See the upper left hand corner of the picture).

Encoder Switch panelconnector

NiBP tubingconnector

SpO2 cable

Backlight inverter Display backplate

Backlightinvertercable

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Disassembly Procedures (A3)

Procedure to remove the switch panel:

1. The switch panel is attached with an adhesive to the front panel.2. Carefully lift up one corner of the switch panel and peel it away from the

front panel. When the switch panel is free, feed the connector through the slot in the front panel.

Procedure to remove the LCD:

1. Remove the six fastening screws around the periphery of the display backplate. Retain the fastening screws for reassembly.

2. Carefully remove the metal and foil grounding tabs and washer noting their location and orientation for reassembly. The display backplate can now be removed.

3. Disconnect the backlight connector from the backlight inverter. The LCD can now be lifted out of the front bezel assembly.For reassembly, place the LCD into the backplate before seating down on the screws. Confirm that the foil ground tab and unused white wire cable is placed out of the way and over the taller standoff.

Foil ground tab

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Disassembly Procedures (A3)

Rear Case Disassembly Procedures

Procedure to remove the battery:

1. Use a screwdriver to remove the three screws holding the battery cover plate in place.

2. Grasp the strap, accessible through the opening in the top foam cover, and gently pull the battery from its housing.

3. Remove the wire connectors from the battery clips. Remember that the red wire is connected to the plus (+) side of the battery pack.The + indicator is located under the foam piece.

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Disassembly Procedures (A3)

Procedure to remove the recorder and the battery housing:

1. Remove the battery as described in the procedure on page 83. Carefully remove the two foam battery pads from the battery housing.

2. If a recorder is installed, remove it as described in the procedure on page 78.

3. If a recorder is not installed, remove the recorder blanking cover by slipping a small flat-blade screwdriver into one of the slots on the blanking cover. Use a screwdriver to gently depress the snap-tab on the inside of the cover, while pulling the cover away from the monitor. After the first tab is released, repeat the process on the other side of the cover and remove cover.

4. On the rear panel of the monitor, remove the three screws fastening the battery housing.

Recorder housing

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Disassembly Procedures (A3)

5. Carefully slide the battery housing from the rear case assembly.

6. Disconnect the speaker twisted-pair-connector from the power supply PCB. The speaker is mounted on one side of the battery housing.

7. If a recorder is installed, disconnect the ribbon cable from the recorder PCB. The recorder PCB can be removed by removing the four screws fastening the PCB to the battery housing.

Screws fastening battery housing

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Disassembly Procedures (A3)

Procedure to remove fuses:

1. Remove the AC power input fuses, as shown, using the fuse pullers.

Procedure to remove the power supply assembly:

1. On the rear panel of the monitor, remove the eight screws holding the power supply assembly.

2. Carefully lift the power supply assembly from the rear case.3. The power supply assembly can be disassembled into the following

elements:� Power supply PCB� NiBP pump� Heat sink/chassis� Main ribbon cable

Fuse F1 Fuse F2

Screws fastening the power supply assembly

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Disassembly Procedures (A3)

NiBP pumpassembly

Main PCB

Main ribboncable

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Disassembly Procedures (A3)

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7Spare Parts

Introduction

Spare parts, along with part numbers, are listed in the tables that follow. Item No. corresponds to the callout number in Figure 1 through Figure 12. The Page Ref. indicates the page number of the relevant disassembly procedures in Chapter 6.

Small Parts Kit

Most small parts and hardware (screws, fuses, and so forth) can be found in the Small Parts Kit, Part Number M3921-64102.

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Top Level Assembly

Top Level Assembly

Figure 1 A1 Top Level Assembly Drawing (1 of 2)

90 Chapter 7 - Spare Parts

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Top Level Assembly

Figure 2 A1 Top Level Assembly Drawing (2 of 2)

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Top Level Assembly

Item No. Part No. Description Page

Ref.1A M3921-60100 Battery Cover (no temperature module) page 632A M3922-60100 Battery Cover (with temperature module) page 643A M3921-60101 Battery page 634A M3921-60102 Battery Pads page 645A M3922-60200 Temperature Module Housing page 646A M3922-60201 Temperature Probe Sensor Switch page 637A M3922-60202 Temperature Probe Grommet page 658A M3921-60300 SpO2 Connector Hood page 66

- M3921-60301 Rear Cover Gasket page 639A M3921-60103 Battery Cable page 63

92 Chapter 7 - Spare Parts

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Top Level Assembly

Figure 3 A3 Top Level Assembly Drawing

Chapter 7 - Spare Parts 93

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Top Level Assembly

Item No. Part No. Description Page

Ref.

All A3 Models

2 M3926-60800 Handle page 77

94 Chapter 7 - Spare Parts

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Front Case Assembly

Front Case Assembly

Figure 4 A1 Front Case Assembly Drawing (1 of 3)

Chapter 7 - Spare Parts 95

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Front Case Assembly

Figure 5 A1 Front Case Assembly Drawing (2 of 3)

96 Chapter 7 - Spare Parts

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Front Case Assembly

Figure 6 A1 Front Case Assembly Drawing (3 of 3)Connector Panel and Patient Connector PCB

Item No. Part No. Description Page

Ref.10A M3921-60400 Front Cover Assembly (with keypad and

display window)page 70

11A M3921-60401 Display Shield page 7012A M3921-60402 LCD Assembly page 7013A M3921-60403 Display Window (with gasket) page 7014A M3921-60404 Speaker page 7115A15B

M3921-60405 Spring Retainer Clipand Pad

page 71

16A M3921-60406 Knob page 7117A M3921-60407 Encoder page 7118A M3921-60408 Keypad page 72

Chapter 7 - Spare Parts 97

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Front Case Assembly

Figure 7 A3 Front Case Assembly Drawing (1 of 2)

98 Chapter 7 - Spare Parts

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Front Case Assembly

Figure 8 A3 Front Case Assembly Drawing (2 of 2)

Chapter 7 - Spare Parts 99

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Front Case Assembly

Item No. Part No. Description Page

Ref.

All A3 Models1 M3921-60406 Wheel page 775 M3926-60400 SpO2 module page 80

6 M3926-60305 Connector/cable, ECG/temp page 807 M3921-60407 Encoder page 809 M3926-60600 NiBP fitting and tubing page 81

11 M3926-60401 Cable, SpO2 page 80

12 M3926-60304 Switch panel page 82

M3926A & M3927A8 M3926-60500 PCB, main, new part page 808 M3926-68500 PCB, main, Version 3.0�Exchange part page 80

10 M3926-60303 Inverter, backlight page 8213 M3926-60300 Bezel, front page 82

M3928A & M3929A8 M3928-60500 PCB, main, new part page 808 M3928-68500 PCB, main�Exchange part page 80

10 M3928-60303 Inverter, backlight page 8213 M3928-60300 Bezel, front page 82

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Rear Case Assembly

Rear Case Assembly

Item No. No. Description Part Page

Ref.- M3921-68500 Rear Connector PCB (with ribbon cable)

exchangepage 73

M3921-60500 Rear Connector PCB (with ribbon cable) new

page 73

- M3921-60501 Pump Clamp page 73- M3921-60502 Pump Pad page 73- M3921-60503 NiBP Pump, Fitting, and Tubing page 73- M3921-60505 Foot Cushion page 74- M3921-60506 Handle page 74

Chapter 7 - Spare Parts 101

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Rear Case Assembly

Figure 9 A3 Rear Case Assembly Drawing (1 of 3)

102 Chapter 7 - Spare Parts

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Rear Case Assembly

Figure 10 A3 Rear Case Assembly Drawing (2 of 3)

Chapter 7 - Spare Parts 103

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Rear Case Assembly

Figure 11 A3 Rear Case Assembly Drawing (3 of 3)

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Main PCB Assembly (A1)

Main PCB Assembly (A1)

Item No. Part No. Description Page

Ref.

Agilent A3 (All Models)3 M3927-62000 Recorder module (M3927A/M3929A) page 784 M3926-60106 Plate, recorder blanking (M3926A/

M3928A)page 78

16 M3926-60105 Cover, battery page 8317 M3926-60102 Pads, battery page 8418 M3926-60101 Battery page 8319 M3926-60103 Housing, battery page 8420 M3926-60104 Speaker page 8521 M3927-60201 PCB, recorder (M3927A/M3929A) page 8526 M3926-60703 Cable, main ribbon page 86

Part No. Description Page Ref.

M3921-68600 Main PCB (Model M3921A) - exchange page 75

M3921-60600 Main PCB (Model M3921A) - new page 75

M3922-68600 Main PCB (Models M3922A/M3924A) exchange

page 75

M3922-60600 Main PCB (Models M3922A/M3924A) new

page 75

M3923-68600 Main PCB (Model M3923A) exchange page 75

M3923-60600 Main PCB (Model M3923A) new page 75

M3921-60700 NiBP Pneumatic Assembly with Tubing and Fittings

page 75

M3921-68800 Patient Connector PCB (Model M3921A) exchange

page 75

M3921-60800 Patient Connector PCB (Model M3921A) new

page 75

M3922-68800 Patient Connector PCB (Model M3922A) exchange

page 75

M3922-60800 Patient Connector PCB (Model M3922A) new

page 75

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Main PCB Assembly (A1)

Note The Main PCB for all of the A1 models has jumpers which must be set correctly so that the User Interface software is configured to support the measuring parameters of each particular model. There are two jumpers, marked JP101 and JP102 located immediately below the NiBP valve. Ensure that the jumpers are installed as noted in the table which follows.

M3923-68800 Patient Connector PCB (Model M3923A) exchange

page 75

M3923-60800 Patient Connector PCB (Model M3923A) new

page 75

M3924-68800 Patient Connector PCB (Model M3924A) exchange

page 75

M3924-60800 Patient Connector PCB (Model 3924A) new

page 75

Located in Small Parts Kit

M3921-64102

Fuse F301, 4A page 75

Part No. Description Page Ref.

Model Number JP101 JP102

M3921A Installed Installed

M3922A Installed Empty

M3923A Empty Installed

M3924A Empty Empty

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Power Supply, Cables, and Miscellaneous Parts

Power Supply, Cables, and Miscellaneous Parts

Figure 12 A3 Power Supply/Heat Sink Assembly Drawing

Chapter 7 - Spare Parts 107

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Power Supply, Cables, and Miscellaneous Parts

Part No. Description

M3921-61000 Power Supply Assembly - 110V

M3921-61010 Power Supply Assembly - 220V

Item No. Part No. Description Page

Ref.

- M3926-60700 Power Supply Assembly-new part page 86

- M3926-68700 Power Supply Assembly-exchange part page 86

22 Located in Small Parts Kit

M3921-64102

Fuse, 0.75A, slo-blow, 250V, 5x20 mm page 86

23 M3926-60702 PCB, power supply page 86

24 M3926-60601 Pump, NiBP page 86

26 M3926-60703 Cable, main ribbon page 86

Part No. DescriptionApplies To

A1 A3

8120-5429 Power Cord, US (903) 2.4m � �

8120-1689 Power Cord, Europe (902) 2.0m � �

8120-1351 Power Cord, UK (900) 2.3m � �

8120-4475 Power Cord, Australia (901) 2.0m � �

8120-2104 Power Cord, Switzerland (906) 2.0m � �

8120-2956 Power Cord, Denmark (912) 2.0m � �

8120-4211 Power Cord, South Africa/India (917) 2.0m � �

8120-5342 Power Cord, Japan (918) 2.5m � �

8120-5182 Power Cord, Israel (919) 2.0m � �

8120-6869 Power Cord, Argentina (920) 2.0m � �

8120-6980 Power Cord, Chile (921) 2.0m � �

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Power Supply, Cables, and Miscellaneous Parts

8120-8376 Power Cord, China (922) 2.0m � �

M3926-60801 Feet � �

M3926-60402 SpO2 Door � �

M3926-61000 DC Input Cable � �

M3926-61010 Defib Sync Cable � �

M3921-61030 Nurse Call Cable � �

M3921-61040 PC RS-232 Null Modem Cable � �

Part No. DescriptionApplies To

A1 A3

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Exchange Unit Part Numbers

Exchange Unit Part Numbers

Part Number Description

M3925-60000 Thermal Recorder for A1 Patient Monitor GSI

M3921-68020 A1 Patient Monitor, Exchange Unit

M3922-68020 A1 Patient Monitor, Exchange Unit

M3923-68020 A1 Patient Monitor, Exchange Unit

M3924-68020 A1 Patient Monitor, Exchange Unit

Part Number Description

M3927-62000 Thermal Recorder for A3 Patient Monitor GSI

M3926-68020 A3 Patient Monitor, Exchange Unit

M3927-68020 A3 Patient Monitor, Exchange Unit

M3928-68020 A3 Patient Monitor, Exchange Unit

M3929-68020 A3 Patient Monitor, Exchange Unit

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8Packing For Shipment

General Instructions

To ship the monitor for any reason, follow the instructions in this section.

Pack the monitor carefully. Failure to follow the instructions in this section can result in loss or damage not covered by the warranty. If the original shipping carton is not available, use another suitable carton.

Prior to shipping the monitor, contact your Philips Response Center for a returned goods authorization (RGA) number. Mark the shipping carton and any shipping documents with the RGA number.

Repacking In Original Carton

If available, use the original carton and packing materials. Pack the monitor as follows:

1. Place the monitor and, if necessary, accessory items in original packaging.

2. Place in shipping carton and seal carton with packaging tape.3. Label carton with shipping address, return address and RGA number, if

applicable.

Repacking In A Different Carton

If the original carton is not available, use the following procedure to pack the monitor.

1. Place the monitor in a plastic bag.2. Locate a corrugated cardboard shipping carton with at least 200 pounds

per square inch (psi) bursting strength.3. Fill the bottom of the carton with at least 2 inches of packing material.4. Place the bagged unit on the layer of packing material and fill the box

completely with packing material.5. Seal the carton with packing tape.6. Label the carton with the shipping address, return address, and RGA

number, if applicable.

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Repacking In A Different Carton

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9RS-232 Interface

Proper Use

Caution Connection to a battery operated PC should only be allowed by the end user.

Connection to a line powered device with an ITE Class II power supply is acceptable provided it passes all 60601-1-1 tests without a problem.

If there is a line powered device with a Class I power supply, such as a line powered PC or a laser printer in the system, there must be either optical isolation of the data cable or the Class I devices must have isolation transformers.

If you connect the monitor to any instrument, verify proper operation before clinical use. Refer to the other device�s manual for full instructions.

Accessory equipment connected to the monitor�s data interface must be certified according to IEC Standard 950 for data-processing equipment or IEC Standard 601-1 for electromedical equipment. All combinations of equipment must be in compliance with IEC Standard 601-1-1 systems requirements.

Anyone who connects additional equipment to the signal inport port or signal output port configures a medical system and is therefore responsible to ensure that the system complies with the requirements of system standard IEC Standard 601-1-1. If in doubt, consult Philips� Response Center or you local Philips representative.

� This ISM device complies with Canadian ICES-001.� Cet appareil ISM est conforme a la norme NMB du

Canada.

Note The monitor and its accessories must be tested by qualified service personnel at regular intervals to verify proper operation, according to the procedures of the user�s institution.Additional important safety information is located in the User�s Guide.

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Cable Connections

Cable Connections

The 9-pin connector mounted on the rear panel provides an access port for a serial (RS-232) interface to a suitably configured personal computer. Or, alternatively, qualified service personnel can use the connector to send a Nurse Call signal.

Nurse Call

Pin 9 of the RS-232 serial interface connector provides an Alarm Out signal. Any time there is any alarm condition active in the monitor, pin 9 goes to plus RS-232 level voltage (> +5 VDC), if Nurse Call Signal is set to ON in the Set-up Menu. Any time there is no active alarm condition, pin 9 is at minus RS-232 level voltage (< �5 VDC).

The ALARM SILENCE button does NOT deactivate the Nurse Call Signal.All alarm conditions must cease before the signal level returns to minus RS-232 level voltage (�5 VDC).

If in the Set-up Menu Nurse Call Signal is set to OFF, pin 9 is always be at the minus RS-232 level voltage. In order to make use of the Alarm Out signal, pin 9 should be connected to a high-impedance circuit (>1000) and protected against transient voltages.

Pin # Signal Direction

1 not used

2 Rx data input

3 Tx data output

4 DTR output

5 Signal Ground input/output

6 DSR input

7 RTS output

8 CTS input

9 Alarm Out output

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10Training Program

Introduction

The purpose of this chapter is to provide a complete, flexible training program that addresses the needs of technical personnel who service the monitor at all levels of involvement.

The training is self-paced. This chapter guides you through the entire service training program. All the information you require is in this chapter, or referred to in this chapter.

Levels of Involvement

Preventative Maintenance Only

If you are performing only preventative maintenance on the monitor, you must review the following sections of this chapter:

� Overview

� Preventative Maintenance

Phone Support or Service

If you are providing phone support or servicing of the monitor, you must review the following sections of this document:

� Overview

� Support Strategies

� Theory of Operation and System Architecture

� Troubleshooting

� Monitor Applications and Algorithms

� Disassembly

� Preventative Maintenance

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Training Materials

Training Materials

Essential Materials

The essential materials to complete this training:

� This A1 & A3 Service Guide (M3921-9000C)

For Philips Service Personnel, a Training Completion Form must be signed and returned to your supervisor referencing the course number "MWPMD-A1/A3SUPP".

Optional Materials

Optional materials that can assist you in this training:

� An A1 and an A3 monitor

� The A1 and A3 User�s Guide

� See page 10 of this service manual. This lists the tools needed for performance verification of the monitor.

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Overview

Overview

This section provides a high level overview of the monitors and their options.

Note The monitor is designed for non-invasive use only.

Common use models include:

� Physicians� offices

� Transport within a care facility

� Low-acuity monitoring in any clinical environment

The monitor has an RS-232 interface, and this port is used as follows:

� A1 - for Nurse Call and for connecting the optional M3925A standalone recorderIt is not possible to use the Nurse Call and the recorder at the same time.

� A3 - for Nurse Call onlyThe configuration of this port is on page 113.

Model Measurement Parameters and Features

NiBP SpO2 Temp ECG Resp Integral Recorder

Color/Mono

A1 Monitor

M3921A Yes Yes No No No No Mono

M3922A Yes Yes Yes No No No Mono

M3923A Yes Yes No Yes No No Mono

M3924A Yes Yes Yes Yes No No Mono

M3925A Optional Standalone Recorder for A1

A3 Monitor

M3926A Yes Yes Yes Yes Yes No Mono

M3927A Yes Yes Yes Yes Yes Yes Mono

M3928A Yes Yes Yes Yes Yes No Color

M3929A Yes Yes Yes Yes Yes Yes Color

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Support Strategies

Support Strategies

This section provides a summary of how the monitor was designed to be supported and how Philips provides that support.

There are two main methods of repairing the monitor:

� Unit exchange

� Bench repair

Unit exchange

The primary repair method used by Philips service personnel is unit exchange. The current design of the monitor requires testing if the case is opened.

Bench repair

The secondary repair method is bench repair. Special tools are required and are listed in Chapter 3 under the section �Equipment Needed�. If the case is opened, specific tests must be performed. These tests are listed in detail along with the Test Map in Chapter 3.

At the Philips parts center, we will stock the board level assemblies and mechanical parts based on existing failure data and customer demand. These parts are listed in Chapter 7. The availability of the spare parts will be notified by service notes, as soon as they are set up at our parts center.

The troubleshooting guide in Chapter 5 is sufficient for assembly level bench repairs. Before a repair is performed, consider whether a repair or a replacement is most suitable. The main PCB for the monitor is only slightly less expensive than an exchange device. Therefore, if troubleshooting indicates that the fault lies in the main PCB, it is highly recommended that an exchange unit is ordered and the defective returned. Not only does this save time and effort, but it is also a more cost-effective solution.

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Theory of Operation and System Architecture

Theory of Operation and System Architecture

General

This section contains a high level overview of the theory of operation of the major functional modules of the monitor. Philips service providers perform Bench Repair at the assembly level. For this purpose, they should review this high level information.

Anyone wishing to perform component level repairs should review the detailed information provided in the Concepts Guide.

Please be aware that Philips only stocks assembly level parts.

System Overview - A1

This section contains a system overview for the A1 monitor, including the overall block diagram, power supply, isolated front end, NiBP control, the SpO2 processing module, and microcontroller.

Block Diagram - A1

The monitor contains an isolated front-end section, powered by an isolated power supply, and in which the signals from SpO2, temperature, and ECG sensors are processed (see Figure 1).

The plastic tubing provides sufficient isolation for signals from the cuff in NiBP monitoring.

A single A/D converter is used to digitize processed temperature, NiBP, and ECG inputs; the SpO2 module produces digitized data.

A microcontroller, Intel 386, requests and receives instructions from a flash memory. The processor has a 16-bit data bus, and uses 19 of the 24-bit address bus. These, and eight control signals, are used to read and write to the DRAM, flash memory, UART, and FPGA (programmable gate array). Other interface connections are made through the I/O port signals, timer signals, and interrupt signals.

The FPGA provides signals for control and data to the LCD. Bias voltage and backlight power for the LCD are provided by the power supply section. The FPGA processes front-panel button and A1 wheel operations.

Circuit details for these blocks are contained in the Concepts Guide.

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120

Block Diagram - A1

Figure 1 A1 Block Diagram

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System Overview - A3

The A3 is a full function monitor for use on adult and pediatric patients.

The functions performed by the system include monitoring patient ECG, heart rate, respiration rate, blood pressures, blood oxygen saturation, and temperature.

In addition to monitoring and displaying the status of these physiological parameters, the instrument performs various microprocessor-programmed analytical functions, such as:

� Creating both visual and audible alarm signals when set limits are violated

� Creating and displaying warning messages when conditions are detected that would degrade or prevent valid measurements

� Creating and displaying trend waveforms or tabular data;

� Providing a synchronizing pulse for defibrillator operation;

� Providing input to an optional recorder for printout of current or trend waveforms or tabular data.

The monitor is essentially a battery-powered instrument. An internal charging unit is designed to accept either an AC line voltage or DC source input voltage. The charger uses these external power sources to maintain a �float� voltage source available from the batteries.

Block Diagram - A3

The A3 functions are represented graphically in the System Block Diagram, Figure 2.

Each section of the System Block Diagram is described briefly in the text that follows the illustration. This is followed by more detailed descriptions of the theory of operation of each block.

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122

Block Diagram - A3

Figure 2 A3 Block Diagram

Isolated Front End The Isolated Front End section includes all the circuitry to convert ECG,

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SpO2, and temperature measurements to digital format and to connect this information to the processor. The respiration detection is obtained from two of the three electrodes of the ECG connections.

Galvanic isolation of these circuits from the remainder of the monitor is accomplished by utilizing an isolated power supply and by incorporating opto-isolators between the Front End outputs and inputs to the microprocessor computation and control circuitry.

NiBP Front End The NiBP section contains the pumps, valves, pressure measurement circuitry, and control circuitry for the noninvasive blood pressure measurement. Pressure data is converted to digital format and conveyed to the processor section.

Power System The power system section contains a power supply capable of operating the monitor and charging the battery from either an AC source of 100 to 240 volts AC at 50 to 60 Hz or a DC input of 10 to 16 volts. This section also contains the circuitry. The battery provides the operating power for the monitor.

Power system outputs of ±12 volts DC, +5 volts DC, and �24 volts DC are developed for use throughout the non-isolated portions of the monitor.

Microprocessor,Memory and

Control

The microprocessor (µP), Memory and Control section contains the system CPU and all digital support circuitry. The latter includes the RAM, nonvolatile memory, and real-time clock. This section also contains the display logic, keypad (switch) interface logic, RS-232 I/O control, defibrillator synchronization control, and printer logic.

Display The display is a cold-cathode, backlit, fluorescent LCD unit. The pixel resolution of 0.23 mm provides a 640 x 480 line display. For the A3 models M3926A and M3927A, the display is presented in black and white mode only (no gray scale). The A3 models M3928A and M3929A have color a display.

Keypad (Switches)and Wheel

The keypad circuit contains five push-switch membrane switches and two green LEDs. The LEDs are driven by the power supply system and indicate (AC or DC), the charging of the batteries, and the condition of the source cable in-line fuses.

Signals from the LEDs are returned to the microcomputer for processing and control as required.

The power switch, connected directly to the supply, toggles the power between Standby and On modes. When in Standby, the display is blank, and

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no monitoring is performed. However, the batteries are charging if either an AC or DC power source is connected to the rear panel.

The alarm silencing switch is connected directly to the processor and to the system power supply. Pressing this switch turns off the battery fuse alarm in the system power supply. Response of the processor depends upon the action in pressing this switch. If momentarily pressed (less than 2 seconds), alarms are silenced temporarily for a preset interval determined by the menu selection. If held pressed for 2 seconds or more, the Alarm Suspend condition is initiated.

The NiBP switch output is connected to the processor. Response of the processor depends upon the state of NiBP operation at the time and the action in pressing this switch. If momentarily pressed (less than 2 seconds), a single NiBP measurement is obtained. If pressed for 2 seconds or more, the processor initiates a STAT monitoring sequence. Pressing the NiBP switch at any time a pressure measurement is in effect causes the processor to terminate the measurement and to deflate the cuff.

The display Contrast switch operates in conjunction with the navigation wheel to determine the apparent black/white contrast setting in the display. Changing contrast is actually a change in the viewing angle. Outputs of the switch and wheel are connected to the processor.

Momentarily pressing the switch sets the contrast to mid-range, factory-default value.

Momentary pressing of the switch, followed within 3 seconds by a rotation of the wheel are processed to vary the contrast of the display. When there has been no wheel rotation for three seconds, the contrast control function is terminated by the processor. The contrast control function is also terminated if the wheel is pressed any time within this 3 second interval.

Operation of the Volume switch accomplishes similar functions for the volume of the heart rate audible tone as the display contrast control switch does for the display. Pressing this switch enables the wheel to vary the tone volume.

Navigation Wheel This is a rotating, push-switch wheel. The associated wheel circuitry generates a pulse when pressed and generates a digitally encoded pair of quadrature signals whose relative magnitudes and polarities represent the angular position of the wheel. These outputs are connected to the processor where they are interpreted as required for the functions involved. Successive angular positions determine the direction of wheel rotation.

In addition to the functions performed when in conjunction with the keypad switches as described above, the wheel operates in conjunction with the display to select menus and lists of parameter variables.

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RS-232 I/O This is a rear panel 9-pin connector providing interfaces with other computer systems or equipment. The driver for this �port� is a Universal Asynchronous Receive-Transmit (UART) integrated circuit that interfaces this port with the microprocessor. The baud rate for this serial transmission function is programmable from 1200 baud to 38.4 kilobaud.

Pin number 9 of the RS-232 connector is reserved for a Nurse Call signal. The nurse call signal reacts when a low, medium, or high level alarm is activated.

Defib Sync Pulse The rear panel connector for the Defib Sync Pulse is keyed so that the connection of a cable can be detected by the processor. When a connection is detected, the processor software initiates the generation by hardware of a TTL-compatible pulse capable of driving 1 TTL load over a three-meter cable with less that 200 pF capacitance.

The defib pulse is triggered by the detection of the R-wave in the QRS sequence of the ECG wave-form complex. The pulse signal is active for 100 ±10 ms.

Speaker The speaker is capable of providing 73 dBA of volume at a distance of one meter during alarm conditions. The processor drives the speaker in different patterns as specified for the different alarm priorities and conditions. Refer to the operator�s manual for descriptions of alarm responses.

Recorder The optional recorder module is installed in the right panel of the monitor. Refer to the User Guide for printing procedures. It provides users with the capability to obtain hard-copy records of selected vital signs information.

Basic control of the recorder is implemented by two push-switch controls on the recorder front panel. One of these is used to obtain continuous recordings of the real-time waveforms displayed in the top two graphic frames. Along with the waveforms, the recorder prints the values of the vital signs being displayed. The printing continues until the user presses either recorder switch a second time.

The other control switch initiates a printout for 20 seconds of the same information recorded by the continuous control.

If scrolling is enabled in a display frame containing trend data when the continuous recording switch is operated, then the trend record for that vital sign is printed. If the snapshot recording switch is operated, then only the trend data on the display is printed.

The recorder may be programmed via the monitor menu display to print a snapshot recording when an alarm condition occurs.

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Printing is accomplished on 50 mm wide thermal paper at recorder speeds programmable up to 50 mm/s.

ECG Processing The technique used in ECG senses the varying potential difference between two points at the skin surface which respond to the electro-chemical actions of the muscular activity of the heart.

Three electrodes are attached to the patient�s right arm (RA), left arm (LA) and left leg (LL). The varying potentials at these locations are cable-connected to the ECG circuit inputs where they are conditioned, and the difference of potential between two selected leads is digitized before transmitting through opto-isolators to the processor. The processor-installed algorithms operate on the signals to develop drivers for the graphic display and to compute the heart rate in beats per minute (BPM).

In addition to the acquisition of the QRS waveform complex, the ECG input and subsequent signal processing computing circuitry perform a number of other functions:

� They detect a �lead-off� condition if one of the electrode connections is disrupted.

� They detect the presence of pacemaker signals within the QRS waveform complex of the ECG.

� They generate a synchronization pulse for external use with defibrillators. The Defib Sync Pulse output is available at a connector in the rear panel.

RespirationProcessing

The patient�s respiration is detected by using two of the three leads of the ECG electrodes and cable. A low-level excitation signal is applied to these leads, and the variation of the thoracic impedance caused by the breathing is sensed and processed for display and measurement.

NiBP Processing The NiBP processing uses an oscillometric technique to provide needed measurements at selected intervals. This technique uses an inflatable sphygmomanometer cuff similar to those used by clinicians in routine measurements.

A motorized pump inflates the cuff to approximately 180 mmHg initially, at which point the pressure effectively stops the flow of blood. Then, under monitor control, the pressure in the cuff is gradually reduced, while a pressure transducer detects the air pressure and transmits the parameter signal to the NiBP input circuitry.

As the pressure is reduced, blood flows in the previously occluded artery, and changes the measurements made by the transducer. The point at which

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oscillation increases sharply is defined as systolic pressure. As the cuff continues to deflate, oscillation amplitude increases to a maximum, and then decreases. The peak oscillation amplitude is defined as the mean arterial pressure. The point at which the system detects a rapid decrease in oscillation is defined as the diastolic pressure.

SpO2 Processing Measurement of oxygen saturation in the blood uses a specrophotometry technique. It is based on the facts that oxyhemoglobin and deoxyhemoglobin differ in their absorption of red and infrared light, and that the volume of arterial blood in tissue changes during the pulse.

Using these facts, a pulse oximeter passes red and infrared light into an arteriolar bed and measures changes in light absorption during the pulsatile cycle. The light sources are red and infrared light emitting diodes (LEDs), while the detection is accomplished by a photo diode.

To identify the oxygen saturation of arterial hemoglobin, the monitor uses the pulsatile nature of arterial flow. During systole, a new pulse of arterial blood enters the vascular bed, and both blood volume and light absorption increase. During diastole, blood volume and light absorption reach their lowest point. The measurement is based upon the difference between maximum and minimum absorption, focusing on the pulsatile arterial blood.

In addition to the oximetry function, the input signals may be used to calculate heart rate.

TemperatureProcessing

Measurement of patient temperature is accomplished by processing the signal from a probe containing a resistor whose impedance is temperature dependent. The class of such components is called thermistor.

The A3 is designed to accept the signals from electrically isolated Series 400 probes manufactured by Yellow Springs Incorporated. Interchangeable probes in this series may be used for esophageal, rectal, skin or surface, or airway temperature measurement. Probes are furnished with a standard 10-feet lead. Extension leads are available.

The signal from the probe is conditioned by the monitor input circuitry, processed, and used to drive the numeric display.

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Troubleshooting

Troubleshooting

Service personnel concerned with troubleshooting should review the following topics in this manual:

� Error Codes (see Chapter 5)

� Boot Sequence (see Chapter 3)

� Performance verification (see Chapter 3)

This is intended to be a practical, hands-on part of the training program. If possible, therefore, use a monitor to help you learn about troubleshooting the monitor.

When faced with a call regarding the monitor, there are some simple steps that are recommended to solve the failures described below. These failures account for the majority of known failure modes.

Nature of Problem Recommended Action

1. The alarm will not silence. Ensure the external power supply on the A1 or the power cord on the A3 is plugged into AC power.

2 Power related problems. Step 1: Ensure the external power supply on the A1 or the power cord on the A3 is plugged into AC power.

Step 2: If the problem persists, follow the troubleshooting table in Chapter 5.

3 Problems not related to power, and the customer is willing to loose patient data and settings.

Reset all settings to factory presets. This will reinitialize all hardware and software components. The following instructions work for both the A1 and A3:Step 1: With the monitor powered off,

simultaneously press the Volume and Contrast buttons on the front keypad.

Step 2: While continuing to press the Volume and Contrast buttons, power on the monitor.

Step 3: Continue to keep the Volume and Contrast buttons pressed until the power-up diagnostic sequence is complete. When the normal monitoring screen appears, release the two buttons.

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Troubleshooting

Whenever the monitor has been opened, there are specific steps regarding reassembly, described in the disassembly instructions in Chapter 6, that must be followed. If these instructions are not followed, various errors may result. See Chapter 6 for a review of the disassembly and reassembly procedures.

For monitors that are defective on arrival, first go through points 1 to 4 in the troubleshooting table above. If these are not successful, and a replacement monitor is necessary, please contact an Philips sales representative to arrange a replacement.

4 The fuse of the external power supply on the A1 can be blown if there is a defect on the main PCB. In this state the monitor will no longer boot. Therefore if the AC indicator on the A1 does not light...

Step 1: Try to boot up the A1.Note: Do not plug in an operational external power supply to an A1 that will not boot up.Step 2: If the monitor fails to boot, use a

different A1 to test the external power supply for operation, if possible.If the fuse is blown, the Battery Charge, green LED, indicator will not come on and the DC power indicator in the display screen will stay on.

Note: The fuse in the external power supply is not replaceable.

5 The A1 and A3 NIBP valves can stick if they are inactive for several months in extreme environments.

Exercise the valves by using the NiBP test or just through normal use. They will free themselves up.

6 In the A3 with an optional integral recorder, there is a recorder error message.

Press the SNAPSHOT button on the recorder.� If the paper advances, the problem lies in

the monitor, not the recorder.� If the paper does not respond, then the

problem lies in the recorder. Replace the recorder.

Nature of Problem Recommended Action

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Disassembly

Disassembly

Disassembly procedures are described in the disassembly guide in Chapter 6. Please read the whole chapter.

Whenever the monitor has been opened, there are specific steps regarding reassembly, described in the disassembly instructions in Chapter 6, that must be followed. If these instructions are not followed, errors may result.

If the monitor fails the required performance tests described in Chapter 3, then please review the reassembly.

Monitor Applications and Algorithms

Reference Documents and Other Sources

There are various reference documents available to both service providers and the end user. Frequently requested information can be found in the following places:

Information about... Found in...

Supplies/transducer types http://shop.healthcare.agilent.com/hsgstore/catalog/default.asp reference websiteorAppendix C in the User Guide, Technical Data Sheet

Basic monitor specifications Chapter 14 of the User Guide, Technical Data Sheet

Regulatory compliance Chapter 14 of the User Guide, Technical Data Sheet

Other data about algorithms Chapter 14 of the User Guide, Technical Data Sheet

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Preventative Maintenance

Preventative Maintenance

This part of the training program shows you how to carry out effective preventative maintenance. For the tools required for this, see page 10 of this service guide.

Please read:

� Routine Maintenance - Chapter 2

Please review:

� Visual inspection - Chapter 3 (page 8 for the test map)

� Performance verification - Chapter 3

� Power-on tests - Chapter 3

� Safety testing procedures - Chapter 3

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Index

A

Accessoriesunderstanding, 3

AlarmsAlarm Underway condition, 29and alarm silence, 14No Alarm condition, 28

Audible tonestroubleshooting, 50, 60

B

Batterycharge time, 11charging, 11cover removal

A1 series models, 65A3 series models, 85

cushions, removalA1 series models, 66

deep discharges, 42disposal and recycling, 6housing removal

A3 series models, 86maintenance, 5observing polarity, 65, 67, 70performance test, 12removal

A1 series models, 65, 66A3 series models, 85

troubleshootingA1 series models, 52A3 series models, 53

typical operating time, 12Bench repair, 120Block diagram

A1, 122A1 series models, 121A3 series models, 123, 124

Boot sequence, 13Buttons/wheel

troubleshooting, 50, 59

C

Cablesnull-modem, 3part numbers, 110

Cautions, 1Channel designators

analog-to-digital, 43Cleaning, 5Closed case disassembly. See

Disassembly proceduresConnector panel

separating patient connector PCB from, 78

Control circuits, 125

D

Defib sync pulse, 127Deflation rate. See Pneumatic

systemDiagnostic menu, 40

error codes, 40function, 40system information, 41

Diagnostic mode, 40�46accessing, 40accessing error code records, 53entering from power-up defaults

menu, 39purpose of, 40system information screen, 41

Disassemblytraining, 133

Disassembly procedures, 63�89closed case

A1 series modelsbattery

cover, 65if no temp. module, 65temp. module installed, 66

temp. module housing, 66A3 series models

handle, 79recorder, 80wheel, 79

front caseA1 series models, 70�74

encoder, 73keypad, 74LCD display, 72main PCB, 70speaker, 73wheel, 73

A3 series models, 82�84

ECG connector, 82encoder assembly, 82LCD, 84main PCB, 82SpO2 module, 82switch panel, 84temp. cable, 82temp. connector, 82

main PCBA1 series models, 77

NIBP assembly, 77patient connector PCB, 77

connector panel, 78rear case

A1 series models, 75foot cushions, 76handle, 76NIBP pump, 75rear connector PCB, 75

A3 series models, 85battery removal, 85power supply assembly, 88recorder/battery housing, 86removing fuses, 88

separating front and rear case assemblies

A1 series models, 68tools required, 63

Displaydescription, 125removal, 72troubleshooting, 50, 59, 60window removal, 72

E

Earth leakage current, 32ECG

connector removal, 82processing, 128simulator, 18

testing monitor with, 18temp. cable removal, 82

Electrical leakage tests, 30earth leakage current, 32enclosure leakage current, 33patient leakage current, 34

Encoderassembly removal, 82removal, 73

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Index

Error codes, 40and audible alarm tone, 53hex codes, 55, 56hexadecimal representation, 53other, 58

general categories, 58serviceable hardware

A1 series models, 54A3 series models, 56

Error logprintout, 54

Error messagestroubleshooting, 50

Exchange unitpart numbers

A1 series models, 112A3 series models, 112

F

Factory settingsrestoring, 46

Flash memory, 55Foot cushions

removalA1 series models, 76

FPGA, 121Front case assembly

disassembling. See Disassembly procedures

main PCB removalA1 series models, 70A3 series models, 82

separation from rearA1 series models, 68A3 series models, 80

Functional checksperiodic, 5

FusesF301, 52power supply assembly, 53removal

A3 series models, 88

G

Ground integrity tests, 30

H

Handleremoval, 79

A1 series models, 76A3 series models, 79

Hardware and software tests, 14general operation, 27operation with ECG simulator, 18printer verification (A1), 29respiration simulator, 19SpO2 testing, 14temperature simulator, 26

Hex codes. See Error codes

I

Inflation rate. See Pneumatic system

J

Jumpersmain PCB configuration

A1 series models, 108

K

Keypadremoval

A1 series models, 74switches, 125

L

Labels, 5LCD

assembly removal, 72backlight

on-time, 42display, 125

backplate, 84removal

A1 series models, 72A3 series models, 84

LCD displayavoiding damage to, 72

window removal, 72LED excitation test, 17

M

Main PCBchecking fuse F301, 52disassembly, 77jumper configuration

A1 series models, 108removal of NIBP assembly

from, 77removing from front case

assembly, 70separating patient connector PCB

from, 77Maintenance

cleaning, 5periodic checks, 5preventive, 134

Memory, 125Menu

power-up defaults, 37Microcontroller, 121Microprocessor, 125Miscellaneous parts, 110Monitor

algorithms, 133applications, 133cleaning, 5common use models, 119connecting to recorder, 54description, 2main assemblies. See Front and

rear case assemblyon-time, 41operational environments, 2purpose and function, 2repairing, 120testing with temperature

simulator, 26

N

Navigation wheel, 126Neonatal mode, 38NIBP

front end, 125

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Index

pneumatic assemblyremoval from main PCB, 77

processing, 129pump

removalA1 series models, 75

sensorerror

A1 series models, 55A3 series models, 56

test, 44test screen, 44

Notes, 1Null-modem cable, 3Nurse call, 27

and RS-232 pin voltages, 115

O

Operational performancetroubleshooting, 50, 61

Over-pressure. See Pneumatic system

P

Packingfor shipment, 113repacking

in different carton, 113in original carton, 113

Passcodein power-up defaults menu, 37

Patient connectortest cables for, 34

Patient leakage current, 34mains voltage on applied part, 35values, 35

Patient PCB connectorseparating from connector

panel, 78PCB

replacement level support, 49Performance tests, 11�29

battery, 12general operation, 27hardware and software, 14optional A1 printer

verification, 29

pneumatic system verification, 20�25

power-on self-test, 13RS-232 interface, 27serial interface, 27SpO2 testing, 14

Performance verification, 7�36equipment required, 10

Phone support/servicefor training, 117

PinoutsRS-232 interface connections, 115

Pneumatic leakage. See Pneumatic system

Pneumatic systembasic leakage test, 20deflation rate test, 25inflation rate test, 24over-pressure test, 24pneumatic leakage test, 23pressure transducer accuracy, 22verification of, 20

Powercords, 110external supply problems, 51system description, 125troubleshooting, 50

A1 series models, 51A3 series models, 53

Power supplyassembly

disassemblyA3 series models, 88

removalA3 series models, 88

spare partsA1 series models, 110A3 series models, 110

checking fusesA3 series models, 53

external unitproblems

A1 series models, 51troubleshooting

A1 series models, 55A3 series models, 53, 57

Power-on self-test, 13boot sequence, 13

Power-up defaultsconfiguring settings, 37

explanation, 37Power-up defaults menu, 37�39

adult/neonatal mode, 38alarm silence period, 38alarm suspend, 38auto-set limits, 38choices explained, 37, 38entering diagnostic mode, 39language selection, 39passcode, 37permanent audible alarm silent, 38purpose, 37

Pressure transduceraccuracy test, 22

Preventive maintenancetraining, 134training for, 117

Printeroptional for A1 series models, 29verification, 29

R

Rear case assemblydisassembling. See Disassembly

proceduresgasket

A1 series models, 69A3 series models, 80

separation from frontA1 series models, 68A3 series models, 81

Recorderbattery operation, 3communication with monitor, 3connecting to monitor, 54description, 3error log printout, 54external power supply, 3linked indicator, 3mode, 54null-modem cable, 3on-time, 42optional module (A3), 127removal, 80

A3 series models, 86standalone (A1)

connect to RS-232, 119troubleshooting, 61

Reference

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Index

documents, 133website, 133

Repairsupport strategies, 120

Repair methodsbench repair, 120unit exchange, 120

Repairsqualified personnel, 49vs. replacement, 120

Replacementpolicy, 120

Replacement levelmajor subassembly, 49PCB, 49

Replacement parts. See Spare parts

Respiration simulatortesting monitor with, 19

Respirstionprocessing, 129

Restoring factory settings, 46RGA number, 113Routine maintenance, 5�6

battery, 5functional checks, 5safety inspections, 5

RS-232connector

3/16-inch socket for, 63pin 9 for Nurse call, 127

RS-232 interface, 115, 119alarm out signal, 115Nurse call, 119nurse call, 115pinouts table, 115standalone recorder (A1), 119test, 27

S

Safety checksperiodic, 5

Safety tests, 30�??categories, 30conformation to standards, 30earth leakage current, 32electrical leakage, 30enclosure leakage current, 33

ground integrity, 30patient leakage current, 34

AC on applied part, 35Screwdriver

icon, 37Phillips-head, 63

Separationof front and rear case assemblies

A1 series models, 68A3 series models, 80

Serial interfacetest, 27voltages, 28

Service notes, 120Set-up menu

selecting, 37Shipment

packing for, 113RGA number, 113

Small parts kit, 91Spare parts, 91�112

cables, 110exchange unit part numbers

A1 series models, 112A3 series models, 112

front case assemblyA1 series model, 99A3 series models, 102

main PCB assemblyA1 series models, 107

miscellaneous, 110obtaining, 49power cords, 110power supply assembly

A1 series models, 110A3 series models, 110

rear case assemblyA1 series models, 103A3 series models, 107

small parts kit, 91top level assembly

A1 series models, 94A3 series models, 96

Speakerloudness of alarms, 127removal

A1 series models, 73SpO2

module

removal, 82troubleshooting, 56, 57

processing, 129testing, 14

alarms and alarm silence, 14dynamic operating range, 17HR tone volume control, 16LED excitation test, 17

SRC-2switch settings, 12, 15, 16, 17, 28

Support strategiesfor repair, 120

Switch panelremoval, 84

System A/D values, 42System information, 41

screen, 41System overview

A# series models, 123A1 series models, 121

T

Temperatureprocessing, 130

Temperature module, 65housing removal, 66

Temperature simulator, 26Test and inspection matrix

reporting, 9test map, 8

Test equipmentfor performance verification, 10

Tests. See Electrical leakage tests, Ground integrity tests, Hardware and software tests, LED excitation test, Performance tests, Pneumatic system, Power-on self-test, Safety tests, SpO2

Theory of operation, 120Tools

for disassembly, 633/16-inch socket, 639/16-inch socket, 63needle-nose pliers, 63Phillips-head screwdriver, 63

Trainingblock diagram (A1), 121

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completion form, 118disassembly, 133for phone support/service, 117for preventative maintenance, 117levels of involvement, 117materials, 118

essential, 118optional, 118

overview, 119preventive maintenance, 134system overview

A3 series models, 123system overview (A1), 121troubleshooting, 131

Training program, 117�134overview, 117

Troubleshooting, 49�62audible tones, 50, 60buttons/wheel, 50, 59display, 50, 60error codes

other, 58serviceable hardware

A1 series models, 54A3 series models, 56

error messages, 50NIBP system faults

A1 series models, 55A3 series models, 56

operational performance, 50, 61power problems, 50

A1series models, 51A3 series models, 53

printing error log, 54problem categories, 50quick guide, 131recorder

paper/print problems, 61serviceable hardware error codes

A1 series models, 54A3 series models, 56

training, 131

U

UART, 121Unit exchange, 120Use models

common, 119

V

Volume control. See SpO2 testing

W

Warnings, 1Wheel

9/16-inch socket for removal, 63description, 125removal, 73, 79

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